| 单词 | Algol |
| 例句 | “I just finished Perseus. That there is Algol—the demon star. This here is pretend outer space—or fantasy outer space—so we’re not really interested in arranging the constellations the way they usually appear.” Boy21 2012-01-01T00:00:00Z The star Algol, in the constellation of Perseus, changes its brightness in an odd but regular way. Astronomy 2016-10-13T00:00:00Z The naked-eye star Algol sits in the constellation Perseus, which will be rising high in the northeastern evening sky on Halloween. Halloween Sky Guide: 6 Eerie Sights to Haunt Your Night 2017-10-27T04:00:00Z Algol in the constellation Perseus, rising in the northeastern sky after nightfall near the triangular pattern formed by Capella, Mirfak, and the Pleiades cluster. This Week’s Night Sky: Stellar Ghoul Haunts Halloween Skies 2015-10-26T04:00:00Z This all followed the exquisite experience of learning Algol using punch cards through the Michigan Terminal System running on Amdahl computers. What Tech Skills Should Students Acquire to Get Summer Jobs 2014-11-30T05:00:00Z They also measured the changing light of stars such as Algol, and speculated that the regular dimming of Algol's light might have been caused by eclipses due to a "dark body," perhaps even a planet. The deaf astronomer and the 'dark body' 2012-12-18T09:39:13Z Normally, Algol is a fairly bright star, but at intervals of 2 days, 20 hours, 49 minutes, it fades to one-third of its regular brightness. Astronomy 2016-10-13T00:00:00Z A very curious variable star of the Algol type is that known as R R Draconis. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z That night, the naked-eye star Algol sits in the constellation Perseus, rising high in the northeastern evening sky. This Week’s Night Sky: Stellar Ghoul Haunts Halloween Skies 2015-10-26T04:00:00Z The spectra of all the Algol variables are of the first or Sirian type. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z The two determined that the dimming of Algol's light occurred exactly every 2.767 days and speculated that an unseen planet was eclipsing the star. The deaf astronomer and the 'dark body' 2012-12-18T09:39:13Z Unfortunately, Goodricke had no way to test this idea, since it was not until about a century later that equipment became good enough to measure Algol’s spectrum. Astronomy 2016-10-13T00:00:00Z The Algol variation of light was suggested by MM. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z This week, Algol reaches its dimmest point at 8:50 a.m. This Week’s Night Sky: Stellar Ghoul Haunts Halloween Skies 2015-10-26T04:00:00Z Stebbins of Urbana has been very successful in its application and he discovered the secondary minimum of Algol with the selenium cell. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z The Persian astronomer Al Sufi, in his "Description of the Heavens," written in the tenth century, describes the well-known variable star Algol distinctly as a red star. Scientific American Supplement, No. 648, June 2, 1888. 2011-12-26T03:00:15.410Z The discovery that Algol is a spectroscopic binary verified Goodricke’s hypothesis. Astronomy 2016-10-13T00:00:00Z A line drawn toward Perseus through the stars in Andromeda’s head and left hip points out the star Algol, which is the head of Medusa, held in Perseus’ left hand. The Star People 2011-11-06T02:00:16.133Z Known as an eclipsing binary variable, Algol is normally the second-brightest star in the constellation Perseus at 2.1 magnitude, which is about as bright as stars in the Big Dipper. This Week’s Night Sky: Stellar Ghoul Haunts Halloween Skies 2015-10-26T04:00:00Z This figures out to be practically the same size as that of our sun, while Algol's own diameter is rather larger, exceeding a million miles. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z Above thee soared the Pleiades, Beneath, Auriga flared; His vast melodic harmonies Rigel with Algol shared: Space trembled to the minstrelsy Of Deneb and Alcyone. The Piper and the Reed 2011-09-10T02:00:23.967Z He suggested that Algol’s unusual brightness variations might be due to an invisible companion that regularly passes in front of the brighter star and blocks its light. Astronomy 2016-10-13T00:00:00Z This star Algol, or the Demon, as the Arabs call it, is in some respects the most wonderful and interesting in all the heavens. 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 But over a 10-hour period, Algol fades dramatically to 3.4 magnitude and then again brightens, as one star passes in front of the other. This Week’s Night Sky: Stellar Ghoul Haunts Halloween Skies 2015-10-26T04:00:00Z The gravitation of this dark companion displaces Algol itself alternately toward and from the earth, because the two bodies revolve round their common center of gravity. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z And thus we do appear to have, in this observed acceleration of the periods of Algol, an evidence that that luminous mass has not yet reached its final and permanent condition. The Plurality of Worlds 2011-06-01T02:00:23.787Z The eclipsing binary Algol drops from maximum to minimum brightness in about 4 hours, remains at minimum brightness for 20 minutes, and then takes another 4 hours to return to maximum brightness. Astronomy 2016-10-13T00:00:00Z 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 V. Algol stars, or stars which for the greater portion of the time undergo no change in light, but every few days suffer a remarkable diminution in light for a few hours. A Plan for Securing Observations of the Variable Stars 2011-03-20T02:00:35.713Z For most of this period Algol is an easy second magnitude star; then in about four and a half hours it loses nearly five-sixths of its light, receding to the fourth magnitude. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z In like manner, Algol's periods are not quite uniform. The Plurality of Worlds 2011-06-01T02:00:23.787Z The names of such stars as Algol, Aldebaran and Boötes preserve the traces of Arab conquests in the sky. A Short History of the World 2011-03-04T03:01:03.147Z Algol, the most famous of these variable stars, at its maximum of brightness furnishes three times as much light as when at its minimum, and other variable stars show an even greater range. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z The phenomena of the Algol stars are in many respects the most striking of any. A Plan for Securing Observations of the Variable Stars 2011-03-20T02:00:35.713Z Our club has still to catch Algol, the "demon's eye," which goes out and gleams forth every three days, because it is obscured by some dark planet we can never see. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place Another explanation of the variable period of Algol, is that the star is moving towards us, and therefore the light occupies less and less time to reach us. The Plurality of Worlds 2011-06-01T02:00:23.787Z Algol, however, finding that the spot beside the captain's camp stool was as dry as anything could be on Venus, decided to turn back. Collector's Item The Algol variables.—On the other hand, some variable stars present an almost perfect regularity, repeating their changes time after time with a precision like that of clockwork. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z In fact it is almost impossible to prove that it may not be an Algol star with a long period between the minima. A Plan for Securing Observations of the Variable Stars 2011-03-20T02:00:35.713Z But, not so fast! lest we forget the little changing star Whose place is West of Algol, farther South— Mira, "the Wonderful," in Cetus or the Whale. How Girls Can Help Their Country This particular nebula is in Andromeda, and is not far from Algol; and it is not difficult to find. The Children's Book of Stars Algol, who was in considerably deeper than his ankles, mewed fretfully. Collector's Item The arrows shown in Fig. 130 are a feature not usually found with light curves, but in this case each one represents a spectroscopic determination of the motion of Algol in the line of sight. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z Even after seven nights’ observations, on which no change is noted, it will only be about an even chance that the star may not still be of the Algol type. A Plan for Securing Observations of the Variable Stars 2011-03-20T02:00:35.713Z Algol leads to Mirfach, the brightest star of Perseus, Who saved the captive Andromeda, daughter of Cepheus, "the Monarch," And royal Cassiopeia. How Girls Can Help Their Country And this is really the explanation of the strange changes in the brightness of Algol, for such a dark body as we are imagining does in reality exist. The Children's Book of Stars I only came, like Algol did, because I didn't have any choice. Collector's Item Algol is one of the most conspicuous of these variable stars, as they are called. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z The star is a remarkable variable, belonging to what is called the Algol type. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers The period of Algol is a little under three days. Astronomy of To-day A Popular Introduction in Non-Technical Language At this distance Algol, as observed from the planet, will fill half the sky, and the heat he gives out must be something stupendous. The Children's Book of Stars Algol sniffed the bush with disgust, then turned away. Collector's Item Stars of this class are all very remote, and no attempt has as yet been made to ascertain the parallax of Algol. The Astronomy of Milton's 'Paradise Lost' The chief attraction in Perseus is the changeful and wonderful β, or Algol, the great typical star among the short-period variables. 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 thought probable by good authorities that the companion of Algol is not quite dark, but has some inherent light of its own. Astronomy of To-day A Popular Introduction in Non-Technical Language From irregularities in the movements of Algol it has been judged that there may be also in the same system another dark body, but of it nothing has been definitely ascertained. The Children's Book of Stars Algol, the ship's cat, prudently took sanctuary behind her, then peered out to see what was going on and whether there was likely to be anything in it for him. Collector's Item Again, I may refer to the curious phenomena presented by Algol, a bright star in the head of Medusa. The Beauties of Nature and the Wonders of the World We Live In By means of data thus obtained the mass, size, and distance apart of Algol and its singular comrade have been inferred. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers For the other leading type of variable star, Algol, of which mention has already been made, is the best instance. Astronomy of To-day A Popular Introduction in Non-Technical Language A series of spectral photographs taken there showed each of Algol's minima to be preceded by a rapid recession from the earth, and succeeded by a rapid movement of approach towards it. A Popular History of Astronomy During the Nineteenth Century Fourth Edition Leaning on the captain's brawny arm, Miss Anspacher ploughed through the mud to the ship, followed by the mosquito-bat and Algol, who had been toasting themselves more or less companionably at the fire. Collector's Item There are too many people on it, and not many can afford the passage out to Gamma Leonis IV or Algol VII or some of the nice uncluttered colony-worlds. Starman's Quest Mention has been made of a slight irregularity in Algol's period of variation. 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 to the second of these types that Algol is supposed to belong. Astronomy of To-day A Popular Introduction in Non-Technical Language It seems that the period required by Algol to go through its changes is itself subject to a slow but certain variation. The Story of the Heavens "Perhaps you would compel me to come?" he suggested, as Algol and the mosquito-bat entered into hot competition to catch the crumbs before they sank into the purple ooze. Collector's Item The variable star Algol or Caput Medusæ, which marks the head of Gorgon, was accounted 'the most unfortunate, violent, and dangerous star in the heavens.' Myths and Marvels of Astronomy In other words, once in every two days twenty hours and forty-nine minutes Algol, as seen from the earth, undergoes a partial eclipse. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers The Algol system appears to be composed of a body about as broad as our sun, which regularly eclipses a brighter body which has a diameter about half as great again. Astronomy of To-day A Popular Introduction in Non-Technical Language Assuming the orbit to be circular, the velocity of Algol was found to be twenty-six miles per second. The Story of the Heavens Pulling her out and reviving her caused so much confusion, it wasn't until then that they discovered Algol had disappeared. Collector's Item Not far off is a very curious star, β of Perseus, or Algol, which forms a little triangle with two others smaller than itself. Astronomy for Amateurs It needs no indulgence of the imagination to lend interest to Algol; the simple facts are sufficient. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers An extreme example of this is found in the remarkable star V. Puppis, an Algol variable of the southern hemisphere. Astronomy of To-day A Popular Introduction in Non-Technical Language Mass of Algol 4⁄9 of sun's mass. The Story of the Heavens The water had not reached its blunted top, and on this fairly level strip of ground, perhaps three meters wide, Algol had been paralleling their path in dry-pawed comfort. Collector's Item The Necklace of Algol would be waiting for him when he got to Seladon II. Heist Job on Thizar Perseus, the Rescuer, lies below; β is the famous variable Algol. Half-Hours with the Stars A Plain and Easy Guide to the Knowledge of the Constellations It is, of course, much too near Algol to be seen with the largest telescope. Astronomy of To-day A Popular Introduction in Non-Technical Language The most celebrated of all the variable stars is that known as Algol, whose position in the constellation of Perseus is shown in Fig. The Story of the Heavens Algol arose from Mr. Bernardi's lap and rubbed against its thick pale green stem. Collector's Item There was further mention of the Necklace of Algol; it was second only to the Crown Jewels of the Shan himself. Heist Job on Thizar We can attach that bank account of yours on Algol II long before you could draw the money out.” The Repairman The number of known variables of the Algol type is, so far, small; not much indeed over thirty. Astronomy of To-day A Popular Introduction in Non-Technical Language All the circumstances can thus be accounted for, and even the weight and the size of Algol and its dark companion be determined. The Story of the Heavens Note the famous variable Algol the Demon star. A Field Book of the Stars One: I have no intention or desire to compete with Anson Drake for the Necklace of Algol. Heist Job on Thizar And advice that one transport-cruiser, Algol, with an Army contragravity brigade aboard, and two engineering ships, would leave Odin for Aditya in fifteen days. A Slave is a Slave We have, indeed, a suspicion of at least one, though perhaps it partakes rather of a planetary nature, namely, that "dark" body which continually eclipses Algol, and so causes the temporary diminution of its light. Astronomy of To-day A Popular Introduction in Non-Technical Language Every third night Algol has its light reduced for several hours. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told Note a dull red star near Algol, and a pretty pair just above Algenib. A Field Book of the Stars Algenib in Perseus and Almaach and Algol in Andromeda form a right-angled triangle, illustrate the 47th problem, and display the Grand Master's square upon the skies. Morals and Dogma of the Ancient and Accepted Scottish Rite of Freemasonry You have probably seen, that a Mr. Pigott had discovered periodical variations of light in the star Algol. Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson, Volume 1 Not very far off is the wonderful variable Algol, now due east, and about 58° above the horizon. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. One class of these variable stars, which takes its name from the star Algol, is of special interest. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told Algol, when on the meridian of New York City, is only one tenth of a degree from the zenith point. A Field Book of the Stars In fact, Algol has always arrested the attention of those who observed the heavens, and in early times was looked on as the eye of a demon. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky Certain stars, called Algol stars, vary in light at regular intervals when partially eclipsed by the interposition of a large dark satellite. The Future of Astronomy In this case, at any rate, the conjecture hazarded about Algol, that the star revolves around a dark central orb, would be insufficient to account for the observed variation. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. Thus, also, we find that Betelguese and Algol are without any perceivable indications of hydrogen, and Sirius has it in abundance. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work It is at one apex of the pentagon, about 15° east of Al Rischa in Pisces, and 37° directly south of Algol. A Field Book of the Stars Most of them require much longer periods than Algol, and sometimes a new star which nobody has ever seen before will suddenly kindle into brilliancy. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky Seventeen hours before minimum Algol was receding at the rate of about 24� miles a second, while seventeen hours after minimum it was found to be approaching with a speed of about 28� miles. Scientific American Supplement No. 819, September 12, 1891 The following may help the observer:— On October 8th, 1867, at about half-past eleven in the evening, I noticed that Algol had reached its minimum of brilliancy. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. Such an event would evolve heat enough to make Algol flame up into a star of the first magnitude, and perhaps out-blaze Sirius or Capella in our winter sky. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work Rigel and Betelgeuse and Algol rush through space, and about them probably circle numerous planets inhabited by countless and curious beings, each and all, perhaps, possessing hearts as perturbable as our own. Hints for Lovers It is now known that the bright star Algol is attended by a dark companion. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky By observations with the Potsdam spectograph, Professor Vogel found that the bright star of Algol pulsated backward and forward in the visual direction in a period corresponding to the known variation of its light. Scientific American Supplement No. 819, September 12, 1891 It may be noticed that observation points to a gradual diminution in the period of Algol's varia70tion, and the diminution seems to be proceeding more and more rapidly. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. 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 Resembles normal indent style in Pascal and Algol. The Jargon File, Version 4.0.0, 24 Jul 1996 This dark star sometimes comes between Algol and the observer and cuts off the light. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky "You and your pastor may go to Algol." The Saint Algol appears of the second magnitude; the remaining 6¾ hours are occupied by the gradual decline of the star to the fourth magnitude, and its equally gradual return to the second. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. There are many variables of the Algol type, and information is steadily accumulating. History of Astronomy "It lies under Andromeda, like Rome," answered Maximus, "but Perseus hangs over the Holy Land, so that Algol stands over Jerusalem." Historical Miniatures The light of Algol shines upon it—a light which travels at one hundred and ninety thousand miles per second, yet requires forty-seven years to reach its destination. Revolution, and Other Essays It was an Algol-60 derivative with a coroutining facility and some new data types intended for building search trees and association lists. The Jargon File, Version 4.2.2, 20 Aug 2000 Ang�lique's finger pointed to the star Algol—that strange, mutable star that changes from bright to dark with the hours, and which some believe changes men's hearts to stone. The Golden Dog But all variable stars do not suffer the sudden variations of Algol. History of Astronomy This star, which is the Algol variable V Puppis, has been found to be a spectroscopic binary. Darwin and Modern Science Roberts, in South Africa, has done splendid work on the periods of variables of the Algol type. History of Astronomy Dr Alexander Roberts, of Lovedale in Cape Colony, truly remarks that the study of Algol variables "brings us to the very threshold of the question of stellar evolution." Darwin and Modern Science |
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