| 单词 | double star |
| 例句 | When we send spacecraft to the planets, when we observe double stars, when we examine the motion of distant galaxies, we find that throughout the universe Kepler’s laws are obeyed. Cosmos 1980-01-01T00:00:00Z Some double stars are so close that they touch, and starstuff flows between them. Cosmos 1980-01-01T00:00:00Z Extrapolation of the statistics of double stars which are greatly disparate in mass suggests that almost all single stars like the Sun should have planetary companions. Cosmos 1980-01-01T00:00:00Z The second star on the “handle” of the Plough is a naked-eye double star. The secrets to stargazing from your backyard 2020-04-23T04:00:00Z The park service is enticing potential visitors by telling them that they could see “an assortment of planets, double stars, star clusters, nebulae and distant galaxies by night.” These National Parks Are Welcoming Stargazers This Summer 2023-06-14T04:00:00Z And a smaller quibble: movie also purports in an early scene to show the double star Mizar and Alcor, but the photograph on screen is not of them. This 25-year-old sci-fi disaster movie is still lauded by scientists — here's why 2023-05-06T04:00:00Z As we will see in The Stars: A Celestial Census, radial velocity measurements of double stars are crucial in deriving stellar masses. Astronomy 2016-10-13T00:00:00Z “You can look for satellites and constellations and double stars,” Oluseyi says. How to Spot a Shooting Star 2021-11-16T05:00:00Z Stellar-size black holes call attention to themselves as they cannibalize their companions in double star systems. Deep in the Cosmic Forest, a Black Hole Goldilocks Might Like 2020-05-06T04:00:00Z A group of scientists discoverd a very old pulsating star inside a double star system, giving them new insights into how such celetial bodies grow and die. Pulsating remains of star discovered by scientists 2020-03-16T04:00:00Z The rare double star system is just the latest in recent cosmic discoveries. Cosmic 'Jekyll and Hyde' discovered as NASA spots rare double star system 2020-02-24T05:00:00Z But we have found planets orbiting close double stars, so that the planet would see two suns in its sky, like those of the fictional planet Tatooine in the Star Wars films. Astronomy 2016-10-13T00:00:00Z The planet travels across the heavens with the double star Spica, a first magnitude object similar in brightness to Mars — dim for the Washington area. This Friday, get ready to join the dark side — of a penumbral lunar eclipse 2017-02-04T05:00:00Z Binoculars easily reveal this elderly giant to be a magnificent double star. This Week’s Night Sky: Watch for Auroras Triggered by Sun Stream Throughout April, Mars, Saturn and the red variable double star Antares form a triangular, cosmic congregation. Skywatch: April brings planetary presents 2016-04-02T04:00:00Z The W-shaped constellation Cassiopeia acts as a guidepost to a double star cluster, which is located in Perseus and visible to the naked eye but an amazing sight through binoculars and telescopes. This Week’s Night Sky: A Comet, Meteors, and Clusters at Play 2015-12-07T05:00:00Z A star like Mizar A, which appears as a single star when photographed or observed visually through the telescope, but which spectroscopy shows really to be a double star, is called a spectroscopic binary. Astronomy 2016-10-13T00:00:00Z Spica is actually a double star system, though the two suns are indistinguishable even with backyard telescopes. This Week's Night Sky: Spot a Gap in Saturn’s Rings 2015-08-17T04:00:00Z The two brightest planets, Jupiter and Venus, are currently aligned in the sky, forming a spectacular "double star" in their closest conjunction since 2000. Jupiter and Venus light up morning sky 2014-08-18T04:00:00Z A flurry of UFO "sightings" is expected early on Monday morning when a spectacular "double star" is created as the two brightest planets in the sky align almost completely. Jupiter and Venus will align almost completely on Monday night 2014-08-15T04:00:00Z Alpha Centauri, only four light-years from here, is actually a double star, Alpha Centauri A and Alpha Centauri B. There is a third star, Proxima Centauri, sometimes called Alpha Centauri C, in the system. Plan to Liven Official Naming of Stars and Planets Hits Clunky Notes 2014-08-04T04:00:00Z Using this information, the astronomers reconstructed the magnetar's history and concluded these objects likely form only in double star systems. Mysterious "Magnetar" Likely Formed with Help from Runaway Star 2014-05-14T04:00:00Z There is an interesting rule about the colors of telescopic double stars. Starry Night: Colors of Summer Stars Explained 2013-07-22T21:45:00.487Z The most common orbital period for double stars outside of star-forming regions is about 200 years, and both shorter and longer periods are rarer. Double Stars Succumb to Fatal Attraction 2012-09-25T21:45:00.217Z The simulations of Pluto's moons, therefore, carry implications for planetary systems around double stars. Pluto's Moons Offer Hints of Alien Worlds 2012-06-06T20:57:17Z Similarly the prism may be used for the study and elimination of personal errors depending on the angle made by a double star with the vertical. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" 2012-04-25T02:00:53.567Z That society printed a portion of it, which serves as an index to the observations of various astronomers on double stars up to the year 1866. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z Here Prof. Newcomb evidently refers to Prof. Burnham, and the 6-inch telescope with which he made many of his remarkable discoveries of double stars. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z That point in the orbit of a double star where the smaller star is farthest from its primary. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z Thus, Pluto and Charon resemble a double star, and the three other moons are like planets going around them. Pluto's Moons Offer Hints of Alien Worlds 2012-06-06T20:57:17Z The double stars, then, were double nebul�, originally single, but separated by a process allied to that known as "fission" in protozoans. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z He therefore mapped down the places and aspects of all the double stars that he met with, and communicated in 1782 and 1785 very extensive catalogues of the results. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z Burnham found it to be a close double star, the companion being about 12th magnitude at a distance of only 2″. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z Among the stars, there are some which are called double stars, and which consist of two stars so near to each other that the telescope alone can separate them to the eye. Joseph Smith as Scientist A Contribution to Mormon Philosophy 2012-03-12T03:00:27.817Z In this constellation β Cygni is a fine coloured double star, consisting of a yellow star, magnitude 3, and a blue star, magnitude 5�. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z His report was most enthusiastic, not only as to clearness and transparency of the atmosphere, but also as to its steadiness, which for planetary and double star observations is almost as important. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z In 1821-1823 we find him associated with Sir James South in the re-examination of his father’s double stars, by the aid of two excellent refractors, of 7 and 5 ft. focal length respectively. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z Al-Sufi says it is a double star of the 5th magnitude. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z One of the nights during my stay was very fine, and he said to me, “Now, Lockyer, let us look at the double stars again,” and we did. Tennyson and His Friends 2011-12-28T03:00:32.373Z The fine double star, μ Cygni, separated by Sir William Herschel in 1779, has magnitudes 4 and 5; it has a companion, of magnitude 7�, which, however, does not form part of the system. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z Nevertheless, the method has not been taken up by astronomers, until very recently at the Mount Wilson Observatory, where Anderson has applied it to the measurement of close double stars. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z The well-known double star 61 Cygni has a proper motion of about five seconds of arc per annum, both components moving through space together. Scientific American Supplement, No. 648, June 2, 1888. 2011-12-26T03:00:15.410Z It is a curious fact that the performance of a really good refracting telescope actually exceeds what theory would indicate! at least so far as double stars are concerned. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z Each of the two great evolutionists helped the other gain influence; but their co-operation was almost as unintentional as that of two luminaries which form a double star. Liberty In The Nineteenth Century 2011-12-24T03:08:02.240Z For example, suppose the sun were accompanied by a companion of equal size at a distance of one million miles, which would make it much like many known double stars. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Probably they are double stars revolving in very small orbits compared with their dimensions, their plane of motion passing nearly through the earth. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z It appears to be almost a rule with double stars to be of two colours. Through Magic Glasses and Other Lectures A Sequel to The Fairyland of Science 2011-10-03T02:00:33.003Z “None of the faint stars near the place presented any peculiarity worthy of remark, but three double stars were found.” Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z The double stars of importance—as in Baedeker—mark our restaurants and theatres. Hints to Pilgrims 2011-08-18T02:00:23.727Z The outstanding fact is that the electrical conditions of a double star must be radically different and vastly more intense than those of a single star like the sun. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z They may be likened to double stars which are permanent neighbors, with some orbital motion, though exceedingly slow. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z There are at least 10,000 double stars in the heavens; though, as we have seen, they are not all binary. Through Magic Glasses and Other Lectures A Sequel to The Fairyland of Science 2011-10-03T02:00:33.003Z Among double stars there are many cases in which variation of colour has been suspected. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z One theory suggests that double stars are more prone to produce the glowing nebulae than singles. Planetary nebula dazzles astronomers 2011-07-29T09:00:00Z So, too, other things being equal, a triple star must be more excited electrically than a double star. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z At all events I continue in the belief that Procyon and Sirius are true double stars, consisting of a visible and an invisible star. Astronomy with an Opera-glass A Popular Introduction to the Study of the Starry Heavens with the Simplest of Optical Instruments 2011-07-17T02:00:30.177Z Observations of double stars made at the U.S. naval observatory. United States Government Publications, v. 8 Jan-Jun 1892 A Monthly Catalog 2011-06-22T02:00:25.153Z This proportion of double stars is not, however, the same for all parts of the sky; while in some regions double stars are very scarce, in other places the proportion rises to 1 in 8. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z Clustered stars, then, and double stars, appear to give us but little promise of inhabitants. The Plurality of Worlds 2011-06-01T02:00:23.787Z If this line of reasoning is correct, the atmosphere of every double star must be in a state of commotion vastly greater than that of the sun's atmosphere even when it is most disturbed. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Besides being a double star, Delta is variable. Astronomy with an Opera-glass A Popular Introduction to the Study of the Starry Heavens with the Simplest of Optical Instruments 2011-07-17T02:00:30.177Z Observations of double stars made at the U.S. United States Government Publications, v. 8 Jan-Jun 1892 A Monthly Catalog 2011-06-22T02:00:25.153Z Yet, again, a third class of double stars has made itself known in the “Algol variables.” Are the Planets Inhabited? 2011-04-24T02:00:07.733Z He made a catalogue of double stars, and found by laborious calculations that such stars have a common centre of gravity; that one sun revolves about another. Famous Men of Science 2011-03-08T03:00:49.717Z According to the distances in Table 5 this gives a range from about 500 years up to about 10,000, which might rise to a million in the case of double stars. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z I may add that, with telescopes, Rigel is one of the most beautiful double stars in the sky, having a little blue companion close under its wing. Astronomy with an Opera-glass A Popular Introduction to the Study of the Starry Heavens with the Simplest of Optical Instruments 2011-07-17T02:00:30.177Z A fine type of such double star is β Cygni, in which the components are respectively yellow and blue, and the yellow star furnishes eight times as much light as the blue one. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z The rest will be double stars, triple stars, starspots and other impostors. In the Hunt for Planets, Who Owns the Data? 2010-06-14T21:48:00Z They also paid some attention to double stars, and did a great deal of work on Jupiter’s satellites. Astronomical Discovery In many of the double stars the two bodies are close together and revolve so rapidly that whatever periodicity they might create in the sun's atmosphere would be very short. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z This flying star is accompanied by two minute companions, which in themselves form a close and very delicate double star. Astronomy with an Opera-glass A Popular Introduction to the Study of the Starry Heavens with the Simplest of Optical Instruments 2011-07-17T02:00:30.177Z It is not every double star to which this process of weighing can be applied. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z He had just brought a double star into the proper focus, and Caroline stood by with note-book and pencil, ready to write at his dictation. Her Season in Bath A Story of Bygone Days Ennis, staring dazedly, noted that the Hindoo wore on his breast a different jewel-emblem from the others, a double star instead of a single one. The Door into Infinity The latter element enters only when it is a question of recognizing the duplicity of a double star, or of distinguishing detail upon the surface of a planet. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" This is a double star, the components being about forty-one seconds of arc apart, the larger of four and one half magnitude, and the smaller of the seventh magnitude. Astronomy with an Opera-glass A Popular Introduction to the Study of the Starry Heavens with the Simplest of Optical Instruments 2011-07-17T02:00:30.177Z The most interesting member of this group is 24 Comae, a fine, wide double star, consisting of an orange star of magnitude 5�, and a blue star, magnitude 7. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 7 "Columbus" to "Condottiere" There were red stars, and blue ones, and once he caught sight of a clearly distinguishable double star, of which each component was visible to the naked eye. The Fifth-Dimension Tube In the robes and concealing hoods, they could not be told from any other two members of the Brotherhood, except that the badge on Ennis' breast was the double star instead of the single one. The Door into Infinity In estimating theoretically the resolving power on a double star we have to consider the illumination of the field due to the superposition of the two independent images. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" Castor is a celebrated double star, but its components are far too close to be separated with an opera-glass, or even the most powerful field-glass. Astronomy with an Opera-glass A Popular Introduction to the Study of the Starry Heavens with the Simplest of Optical Instruments 2011-07-17T02:00:30.177Z The telescope was directed at the double star Castor; which, with Pollux, was glittering brightly in the black-looking sky, when Uncle Richard made way for the boy to take his place. The Vast Abyss The Story of Tom Blount, his Uncles and his Cousin Sam Sun, planets, satellites, comets and meteors are all controlled by gravitation, and the movements of double stars testify to its activity among the more distant bodies of the universe. The Machinery of the Universe Mechanical Conceptions of Physical Phenomena Who, to whom the experience is new, will forget the first evenings spent with even a small telescope, but powerful enough to distinguish double stars and unveil nebulæ? Lotus Buds In investigations extending over a long series of years, the advantage of a large aperture in separating the components of close double stars was fully examined by W. R. Dawes. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" He has used 2,500 very completely, and seen my fine double stars with them. Sir William Herschel: His Life and Works Many double stars show most beautifully contrasted colours: among them are pairs of yellow and rose-red, golden and azure, orange and purple, orange and lilac, copper-colour and blue, apple-green and cherry-red, and so on. The Children's Book of Stars An excellent list of double stars kept up to date, will be found in the annual Companion to the Observatory, published in London. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers He discovered double stars, variable stars, nebulæ, and comets; and Mr. William Herschel, of Bath, the amateur astronomer, was gradually emerging from his obscurity, and becoming a known man. Pioneers of Science Many double stars, for which this has not yet been done, are, however, believed to be, without doubt, binary. Astronomy of To-day A Popular Introduction in Non-Technical Language The double stars were the subject of Herschel's earliest and of his latest papers. Sir William Herschel: His Life and Works Since this discovery double stars have been plentifully found in every part of the sky. The Children's Book of Stars With a five-inch telescope that would mean from two hundred and fifty to three hundred and seventy-five diameters, and such powers should only be applied for the sake of separating very close double stars. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers It is not Uranus, nor the satellites, nor even the double stars and the nebulæ considered as mere objects: it is the beginning of a science of the stars. Pioneers of Science A seeming arrangement of two stars in this way is known as a "double," or double star; or, indeed, to be very precise, an "optical double." Astronomy of To-day A Popular Introduction in Non-Technical Language Herschel himself lived to see some of his double stars perform half a revolution. Sir William Herschel: His Life and Works The average space between such double stars as seen from our earth is—what do you think? The Children's Book of Stars We may just glance at two double stars in the small constellation of Sextans, situated under Leo. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers He has already found about 900 double stars, and almost as many nebulæ. Pioneers of Science A pairing of stars in this way, though often casually alluded to as a double star, is properly termed a "binary," or binary system. Astronomy of To-day A Popular Introduction in Non-Technical Language He has already found about 900 double stars and almost as many nebulæ. Sir William Herschel: His Life and Works If you have remarkably good eyes, you will see that it is a double star. Scouting For Girls, Official Handbook of the Girl Scouts This hue, although not extremely uncommon among double stars elsewhere, recurs again and again, with singular persistence, in this little constellation. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers He announced in 1844 that both Sirius and Procyon were double stars, but that their companions, though large, were dark, and therefore invisible. Pioneers of Science It is among double stars that the richest and most varied colours predominate. The Astronomy of Milton's 'Paradise Lost' The question of determining the parallax of stars first brought Herschel to the discovery of double stars. Sir William Herschel: His Life and Works It was from the first confidently believed that the force retaining double stars in curvilinear paths was identical with that governing the planetary revolutions. A Popular History of Astronomy During the Nineteenth Century Fourth Edition The most striking of these is γ, which is historically interesting as the first double star discovered. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers I hope you will all look at a double star through a telescope, if you ever have an opportunity. The Nursery, May 1877, Vol. XXI. No. 5 A Monthly Magazine for Youngest Readers Mizar, in the constellation Ursa Major, is a beautiful double star. The Astronomy of Milton's 'Paradise Lost' Herschel's first idea of a double star made such pairs as he found, to consist of two stars accidentally near to each other. Sir William Herschel: His Life and Works Of southern double stars, he discovered and gave careful measurements of 2,102, and described 1,708 nebulæ, of which at least 300 were new. A Popular History of Astronomy During the Nineteenth Century Fourth Edition His observations could not have been very extensive or very carefully conducted, for there are many double stars much wider than γ Arietis which Hooke could certainly have separated if he had examined them. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers It is, however, a very interesting example of that remarkable class of objects known as double stars. The Story of the Heavens In 1779 he undertook an extensive exploration of the heavens with the object of discovering double stars. The Astronomy of Milton's 'Paradise Lost' By progressive condensation planetary nebulæ may be successively converted into bright stellar nebulæ, or into nebulous stars, and these again, by the effects of the same cause, into insulated or double stars. Sir William Herschel: His Life and Works The first result of these inquiries was a classed catalogue of 269 double stars presented to the Royal Society in 1782, followed, after three years, by an additional list of 434. A Popular History of Astronomy During the Nineteenth Century Fourth Edition As an educative object for those unaccustomed to celestial observations it may be compared among star clusters to β Cygni among double stars, for the most indifferent spectator is struck with wonder in viewing it. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers Thus, in forty years this double star had moved over an arc of the heavens upwards of three minutes in length. The Story of the Heavens Albireo, in the constellation of the Swan, is one of the loveliest of double stars. The Astronomy of Milton's 'Paradise Lost' Account of the changes which have happened during the last twenty-five years in the relative situation of double stars, with an investigation of the cause to which they are owing. Sir William Herschel: His Life and Works Already, in 1816, we find him reviewing some of his father's double stars; and he completed in 1820 the 18-inch speculum which was to be the chief instrument of his investigations. A Popular History of Astronomy During the Nineteenth Century Fourth Edition And so, notwithstanding the eccentricities of the double stars, we may still cherish the belief that there are eyes to see and minds to think out in celestial space. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers A pleasing class of double stars is that in which we have the remarkable phenomenon of colours, differing in a striking degree from the colours of ordinary stars. The Story of the Heavens The first double star discovered was Mizar, the middle star of the three in Ursa Major which form the tail of the bear. The Astronomy of Milton's 'Paradise Lost' Continuation of the account of the changes that have happened in the relative situation of double stars. Sir William Herschel: His Life and Works He was, while much besides, a specialist in double stars. A Popular History of Astronomy During the Nineteenth Century Fourth Edition In six chapters these twenty-six maps are described so plainly that the amateur can readily find all the interesting star-groups, clusters, and nebul�, and also the colored or double stars. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers He was thus led to the discovery that in many of the double stars the components are so related that they revolve around each other. The Story of the Heavens The astronomer Bode, in 1781, published a list of eighty double stars, and, in a few years after, Sir William Herschel discovered several hundreds more of those objects. The Astronomy of Milton's 'Paradise Lost' They have read guide-books, noting the stars and double stars; they have dipped into histories of art and volumes of criticism. The Gate of Appreciation Studies in the Relation of Art to Life It was also noticed, both by him and Bessel, that double stars are in general remarkable for large proper motions. A Popular History of Astronomy During the Nineteenth Century Fourth Edition In 1871 Burnham believed he had discovered that the companion was an exceedingly close double star. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers When the measurements of the distances and the positions of double stars had been accumulated during many years, they were taken over by the mathematicians to be treated by their methods. The Story of the Heavens The close proximity of the components of double stars impressed the minds of some astronomers with the belief that a physical bond of union existed between them. The Astronomy of Milton's 'Paradise Lost' Sir W. Herschel was looking for double stars of a particular kind in the constellation Gemini when by good fortune the stranger was observed. Myths and Marvels of Astronomy Herschel at first shared the general opinion as to the merely optical connection of double stars. A Popular History of Astronomy During the Nineteenth Century Fourth Edition We may also employ the five-inch for an inspection of the double star ι, whose chief component of the fifth magnitude is beautifully tinged with green. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers But in the case of most double stars we have to do with two bodies not very different as regards mass. The Story of the Heavens He contributed to the science of astronomy, particularly with respect to the study of double stars. A Budget of Paradoxes, Volume II His destination, he discovered, was Groombridge 34, a visual double star. Next Door, Next World Thus it came about that his special attention was early directed to double stars. A Popular History of Astronomy During the Nineteenth Century Fourth Edition Castor may or may not be a variable, but it is, at any rate, one of the most beautiful double stars in the heavens. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers We shall in this brief account select for special discussion and illustration a few of the more remarkable double stars. The Story of the Heavens A term sometimes used to distinguish the smaller component of a double star. The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. There are several double stars; these we shall become acquainted with later on. Astronomy for Amateurs Observers of double stars are among the most meritorious, and need to be among the most patient and painstaking workers in sidereal astronomy. A Popular History of Astronomy During the Nineteenth Century Fourth Edition We should make a mistake if we regarded this wonderful distribution of color among the double stars as accidental. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers Castor is one of the double stars in which the components have been observed to possess a motion of revolution. The Story of the Heavens This is a term used in the orbits of double stars, and implies the motion in a certain time of one star round the other. The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. These marvels are met with especially among the double stars. Astronomy for Amateurs The phenomena of double stars seem to indicate a connection between the state of the investing atmospheres, by the action of which their often brilliantly contrasted tints are produced, and their mutual physical relations. A Popular History of Astronomy During the Nineteenth Century Fourth Edition When the air is steady and the companion can be well viewed, there is no finer sight among the double stars. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers This is, indeed, the best double star in the heavens for the beginner to commence his observations upon. The Story of the Heavens A term usually confined to double stars, to distinguish the line of bearing between them when they are apparently very near to each other. The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. Of course this method can only be applied to those double stars of which the distance is known. Astronomy for Amateurs War troubles supervened, and it was eventually sent to Chicago, where it served Professor Hough in his investigations of Jupiter, and Mr. Burnham in his scrutiny of double stars. A Popular History of Astronomy During the Nineteenth Century Fourth Edition The foot of the cross is indicated by the star β, also known as Albireo, one of the most charming of all the double stars. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers No doubt many of the so-called double stars are produced in this way. The Story of the Heavens CASTOR. α Gemini, a well-known nautical star in the zodiac, which has proved to be a double star. The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. Stellar dial of the double star γ of the Virgin 86 28. Astronomy for Amateurs For sidereal science became a recognised branch of astronomy only through Herschel's discovery of the revolutions of double stars in 1802. A Popular History of Astronomy During the Nineteenth Century Fourth Edition Where there had been one point of green light there were now two, very close together like the double star in the handle of the Dipper. The Night of the Long Knives The sidereal heavens contain few more interesting objects for the telescope than can be found in the numerous class of double stars. The Story of the Heavens In speaking of double stars, it is the space separating the centres of the two stars, expressed in seconds of arc. The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. One of the most splendid of these double stars, and at the same time one of the easiest to perceive, is ζ in the Great Bear, or Mizar, mentioned above in describing this constellation. Astronomy for Amateurs An example of a double star is to be found in the constellation of Lyra. Aether and Gravitation Beyond the tenth planet there was nothing across a vast expanse of the map ... but at the far side was another star symbol, this one a double star with four planetary bodies. Gold in the Sky Aside from double stars, there were no suns yet discovered which were less than light-years apart. Talents, Incorporated Stars shone, and planets moved around them, and double stars circled each other like waltzing couples. A Matter of Importance Another double star is γ of the Ram, of fourth magnitude. Astronomy for Amateurs Several thousand double stars are known altogether, while the motions of several hundreds of them have been detected with powerful telescopes. Aether and Gravitation The double stars have been seen from the seventeenth century, and diligently observed by many from the time of Wm. A Budget of Paradoxes, Volume I Oh things that were, oh things that are, Oh setting of my double star! Ionica It made a sun of it—the original sun is now quite a splendid double star. Skylark Three These exquisite double stars revolve in gracious and splendid couples around one another, as in some majestic valse, marrying their multi-colored fires in the midst of the starry firmament. Astronomy for Amateurs The colours of some of the double stars are very beautiful. Aether and Gravitation I thought you said this was a double star! Islands of Space Omega is a planet which revolves eccentrically around a double star system. The Status Civilization There are several star clusters and double stars to be seen in this constellation. A Field Book of the Stars For instance, one of the double stars we spoke of above, γ of the Virgin, sees its two components, translucent diamonds, revolve around their common center of gravity, in one hundred and eighty years. Astronomy for Amateurs For a long time we had been able to see that Rigel, as inferred from spectroscopic evidence, was a double star—a fainter, greener blue companion revolving with it around their common center of gravity. Out Around Rigel It's impossible for a planet to be in equilibrium about a double star! Islands of Space Already he had made out the double stars in the bunting at the jack-staff. Ray's Daughter A Story of Manila It rises a very little south of the exact eastern point on the horizon. γ is a fine double star for a small telescope. A Field Book of the Stars They should form a fine double star, the Earth being a brilliant orb of first magnitude, and the Moon of third, a charming couple, and admired doubtless as an enchanted and privileged abode. Astronomy for Amateurs Finally, the greater theoretical resolving power of the larger aperture, providing it can be utilized, should permit the separation of the members of close double stars beyond the range of the smaller instrument. The New Heavens I wonder if it couldn't be used to break up a double star? Islands of Space I need not tell you that I wish you all the joy and success the double stars can bring. Ray's Daughter A Story of Manila It is a beautiful double star in a small telescope. A Field Book of the Stars The first recognition of his genius came from England, the agent being Rev. W. R. Dawes, an enthusiastic observer of double stars, who was greatly interested in having the best of telescopes. The Reminiscences of an Astronomer Subsequent measures, of far greater precision than those obtainable by other methods in the case of easily separated double stars, show the rapid orbital motion of the components of the system. The New Heavens See, has shown that the same action has served to give to the double stars the exceeding eccentricity of their orbits. Outlines of the Earth's History A Popular Study in Physiography These duplications are not an optical effect depending on increase of visual power, as happens in the observation of double stars, and it is not the canal itself splitting in two longitudinally. Other Worlds Their Nature, Possibilities and Habitability in the Light of the Latest Discoveries These two stars are gradually separating. β is a double star, one being blue, the other yellow. A Field Book of the Stars The one best man for this duty was S. W. Burnham of Chicago, who had already attained a high position in the astronomical world by the remarkable skill shown in his observations of double stars. The Reminiscences of an Astronomer The Pole Star could have been visited, but it was a double star. Operation: Outer Space In becoming his wife Clara gave him both hands in more senses than one, and they shone together as a double star in the art firmament. For Every Music Lover A Series of Practical Essays on Music Among their cosmic myths, Milligan has preserved one relating to the double stars which perhaps refers to the invention of fire. Myth and Science An Essay Herschel has pushed his discoveries of double stars, now, to upwards of nine hundred, being twice the number of those communicated in the Philosophical Transactions. Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson, Volume 1 Sir William Herschel's catalogues of double stars offer a considerable number to which he ascribes a decided green or blue tint. Biographies of Distinguished Scientific Men Antares is a double star, its companion being a minute green star. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. The double star 61 Cygni, in fact, is displaced very nearly as much in one year as Alcyone with its train in one hundred. Scientific American Supplement, No. 623, December 10, 1887 Some motion must, therefore, be going on in every genuine double star, whether we have been able to see that motion or not. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky His field of observation was for the most part the fixed and double stars. Notable Events of the Nineteenth Century Great Deeds of Men and Nations and the Progress of the World Every astronomer wanted a larger telescope than his neighbors, with which to measure double stars. The Future of Astronomy But in examining double stars there is in general no reason for selecting objects inconveniently situated. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. Castor is a double star; but a third star or planet, as yet undiscovered, is required to account for its perturbations. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work Let us try to conceive our own system transformed into a double star. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky With one of these he discovered two double stars, as they are called. Stories of American Life and Adventure Aldeboran, the Bull's Eye, a double star of the first magnitude in the constellation Taurus. Spenser's The Faerie Queene, Book I Among these we may note ξ, a white star with a scarlet companion; γ, a yellow and garnet double; and ι, a double star, white and pale violet, with a distant red companion. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. Binary system, a double star, the component parts of which revolve around their centre of gravity. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work Whenever you have a chance of looking at the heavens through a telescope, you should ask to be shown what is called a double star. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky On this subject, I consulted the most eminent of all discoverers of double stars, an observer who, even as an amateur, made a glorious reputation by the work done with a six inch telescope. Scientific American Supplement, No. 832, December 12, 1891 Heaven overhead is set with stars, shooting intensely, smouldering with dull red in Aldeboran, sparkling diamond-like in Sirius, changing from orange to crimson and green in the swart fire of yonder double star. Sketches and Studies in Italy and Greece, First Series The upper is Castor, the finest double star visible in the northern heavens. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. The meaning of these double stars is that two or more suns revolve about their centre of gravity, as the moon and earth about their centre. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work Of course you will not imagine that I mean Alcor to be the second component of the double star; it is the bright star near Alcor which is the double. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky The distance of the star 61 Cygni, made known by Bessel, has led approximately to a knowledge of the quantity of matter contained in this body as a double star. COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 Light's far furnace shines, Smelting balls and bars, Forging double stars, Glittering twins and trines. Poems Household Edition We pass to more legitimate observations, noticing in passing that Sirius is a double star, the companion being of the tenth magnitude, and distant about ten seconds from the primary. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. The place of the famous double star 61 Cygni is seen. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work Especially is this true in the case of two suns like those forming a double star. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky Al`gol, a double star in the constellation Perseus, of changing brightness. The Nuttall Encyclopædia Being a Concise and Comprehensive Dictionary of General Knowledge While engaged in this difficult task, Herschel discovered between three and four thousand double stars, which he described in the Memoirs of the Astronomical Society. The Story of the Herschels Our last half-hour with the double stars, &c., must be a short one, as we have already nearly filled the space allotted to these objects. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. Turn a larger telescope on this double star, and each of the components separate into two. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work There is a particularly beautiful double star of this kind in the constellation of the Swan. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky In this business I won my "double stars," although the competition was intense. The Gentleman from Everywhere On page 114, speaking of Kepler's third law, the author says, "And even those extraordinary objects, the revolving double stars, are subject to the same controlling law." The Atlantic Monthly, Volume 06, No. 33, July, 1860 The object of these figures is to enable the observer to know what to expect when he turns his telescope towards a difficult double star. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. In the following year, the former individual communicated to the Royal Society the apparent distances and positions of 458 double stars, of which 160 had never before been observed. The Mirror of Literature, Amusement, and Instruction Volume 12, No. 330, September 6, 1828 You might look at that double star year after year throughout the course of a long life without finding any appreciable change in the relative positions of its components. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky All double stars would be Algol variables if we were exactly in the planes of their orbits. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 With my new telescope I could see Jupiter's four satellites, the craters on the moon, and some of the double stars. Men of Invention and Industry For hours I lay watching Alpha Centauri - the double star of the Great Bear's pointers - dipping under the Polar star like the hour hand of a clock. Tracks of a Rolling Stone There are certain stars which, seen by the naked eye, are single, but when observed through a telescope are seen to be double stars. Love's Final Victory Let us now look at another double star of a different kind. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky The visual double stars afford strong evidence that the order of evolution described is correct. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 Besides, these periodical variations may be accounted for in part--especially in the case of double stars--from their apparent rather than real change of place in the heavens. Life: Its True Genesis At night the clouds were so good as to disperse, and we saw a double star. The Life and Letters of Maria Edgeworth, Volume 2 This is why their names must ever be foremost in a work on Popular Tales, shining, as their names must ever shine, a bright double star in that new hemisphere. Popular Tales from the Norse The big Dipper in the north, with the double star in the handle much plainer than common. Complete Prose Works Specimen Days and Collect, November Boughs and Goodbye My Fancy Aitken has made a specialty of observing the double stars whose components in each case are very close together and are in comparatively rapid revolution. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 Herschel measured double stars and made catalogues with distances and positions. Scientific American Supplement, No. 288, July 9, 1881 Large numbers of nebulæ and double stars have been catalogued, and we have evidence every year of the activity with which these several branches are being followed up. Scientific American Supplement, No. 303, October 22, 1881 So we find parallax, proper motion, double stars, binary systems, variable stars, and new stars all bound together. History of Astronomy Astronomers tell us that there are double stars revolving round one axis and forming a unity, of which the one is black and the other brilliant. Expositions of Holy Scripture Second Kings Chapters VIII to End and Chronicles, Ezra, and Nehemiah. Esther, Job, Proverbs, and Ecclesiastes These are double stars whose light is constant except during the short time when one of the components in each system passes between us and the other component. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 Some double stars, upon which careful observations have been made, are found to have a regular revolutionary motion round each other in ellipses. Vestiges of the Natural History of Creation Of two stars in the constellation Ursa Minoris, not double stars, one is orange and the other is green, both very vivid in color. Maria Mitchell: Life, Letters, and Journals He discovered 2,500 nebulæ and 806 double stars, counted the stars in 3,400 guage-fields, and compared the principal stars photometrically. History of Astronomy Was the Central Sun—as I had come to regard it—a double star? The House on the Borderland In recent years Moulton and Russell have seriously questioned the sufficiency of this force to account for the major part of the separation and eccentricity in the double star systems. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 The double star of the House of Austria seemed with baleful aspect to dominate in the sky, and to threaten with extinction European liberty and progress. Lectures and Essays The Greenwich authorities were delighted with his instrument; they have seen what Herschel calls "my fine double stars" with it. Biographies of Working Men Double Stars.—The large class of double stars has always been much studied by amateurs, partly for their beauty and colour, and partly as a test for telescopic definition. History of Astronomy Socrates and Plato are the double star, which the most powerful instruments will not entirely separate. Representative Men It is difficult to avoid the conclusion that the components of double stars separate more and more widely with the progress of time. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 Schimper is lost in the great impenetrable world of suns, with their planets, moons, and comets; he soars even into the region of the double stars, the milky way, and the nebulae. Louis Agassiz: His Life and Correspondence Cecily and Felix were the only ones who could distinguish the double star in the handle of the Big Dipper, and greatly did they plume themselves thereon. The Story Girl Among the many unexplained stellar problems there is one noticed in double stars that is thought by some to be likely to throw light on stellar evolution. History of Astronomy The Greenwich authorities were delighted with his instrument; they have seen what Herschel calls "MY fine double stars" with it. Biographies of Working Men The conclusions which we have earlier drawn from visual double stars are in full harmony with the argument. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 One of the most conspicuous examples in recent times of how a moderate-sized instrument may be utilized is afforded by the discoveries of double stars made by Mr. S. W. Burnham, of Chicago. Side-Lights on Astronomy and Kindred Fields of Popular Science Then they proceeded to scan the sky, roving from planet to star, from single stars to double stars, from double to coloured stars, in the cursory manner of the merely curious. Two on a Tower William Herschel began his observations of double stars in the hope of discovering an annual parallax of the stars. History of Astronomy Paper after paper was sent to the Royal Society, describing the hundreds, indeed the thousands, of objects such as double stars; nebulae and clusters, which were first revealed to human gaze during those midnight vigils. Great Astronomers We can not hope to watch such changes as they occur, but we can, I think, find abundant illustrations of these processes in the double stars. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 It was with this little instrument that on Mount Hamilton, California—afterward the site of the great Lick Observatory—he discovered forty-eight new double stars, which had remained unnoticed by all previous observers. Side-Lights on Astronomy and Kindred Fields of Popular Science Saturn is lovely; Jupiter is simply sublime; I can see double stars in the Lion and in the Virgin, where I had seen only a single one before. Two on a Tower In the second part of this paper I shall point out the bearing which this investigation of the evolution of an ideal liquid star may have on the genesis of double stars. Darwin and Modern Science No doubt, many of the so-called double stars could be accounted for on this supposition. Great Astronomers The formation of double stars, therefore, is not a sporadic process: it is one of the straightforward results of the evolutionary process. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 In 1802 that greatest of observing astronomers announced to the Royal Society his discovery that certain double stars had changed their relative positions towards one another since he first carefully charted them twenty years before. A History of Science — Volume 3 Mark that day, Memory, with a double star in your catalogue! Little Rivers; a book of essays in profitable idleness The Copley medal was awarded to James South, Esq. for his observations of double stars, and his paper on the discordances between the sun's observed and computed right ascensions, published in the Transactions. Reflections on the Decline of Science in England In certain of the so called double stars, he, no doubt, did find a movement. Great Astronomers Some of the variable stars offer strong evidence as to the early life of the double stars. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 Hitherto it had been supposed that double stars were mere optical effects. A History of Science — Volume 3 Possibly it is true of some of the double stars, but we will not return to that question. The Story of Evolution The number of double stars observable would be very much greater than this if they were not so far away. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 Thus it was demonstrated that in these particular double stars the nearness of the two components was not merely apparent. Great Astronomers There is a very marked progression of the average lengths of periods of the spectrographic double stars as we pass from the Class B to the Class M pairs. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 The condensation of a nebula with two nuclei would form a system of stars close together, turning one upon the other, such as those double stars of which we already know the respective movements. A History of Science — Volume 3 The double stars whose spectra are of the Bright-Line and Class B varieties have their components so close together that only 4, of Class B, are visible. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 If this is true, the Classes G and K; double stars are effectively older than Classes A and F double stars, and these in turn are effectively older than Class B double stars. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 In consequence of this beautiful discovery, the attention of astronomers was directed to the subject of double stars with a degree of interest which these objects had never before excited. Great Astronomers Accumulating evidence is to the effect that the proportion of double stars to single stars may be as great in the Classes A to K as in Class B. 8. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 The pioneer explorers of the double stars early found that the systems into which the stars are linked are by no means confined to single pairs. A History of Science — Volume 3 Of the 20 stars which we say are our nearest neighbors, 8 are well known double stars; one double in each two and one half, on the average. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 Whenever a double star traversed the field Herschel described it to his sister Caroline, who, as we have already mentioned, was his invariable assistant in his midnight watches. Great Astronomers The first step was therefore to observe and to measure with the utmost care the positions and distances of those particular double stars which appear to offer the greatest promise in this particular research. Great Astronomers Similar observations made with the D. O. Mills spectrographs in both hemispheres have shown that about one star in every four of the bright stars, on the average, is a double star. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 He was specially particular to note all the double stars which presented themselves to his observation. Great Astronomers Of course some little discretion must be allowed in deciding as to what degree of proximity in adjacent stars does actually bring them within the category of "double stars." Great Astronomers In other words, Herschel solved in a beautiful manner the problem of finding the true orbits of double stars. Great Astronomers |
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