| 单词 | reflecting telescope |
| 例句 | Since a reflecting telescope does not rely on refraction, it does not produce a halo of different colours around the image. The Invention of Science 2015-09-17T00:00:00Z In a reflecting telescope the image is magnified by a curved mirror, while in a refracting telescope it is magnified by passing through a lens. The Invention of Science 2015-09-17T00:00:00Z Or perhaps Mai's family had an apartment with a roof- deck that housed an amateur self-constructed observatory with a shockingly powerful reflecting telescope. Counting by 7s 2013-08-29T00:00:00Z Singlehandedly, he came up with the reflecting telescope, calculus, the law of gravity … and all before he was 24. TV highlights 12/04/2013 2013-04-12T06:00:05Z Using a large reflecting telescope that he had built, William and his sister Caroline counted stars in different directions of the sky. Astronomy 2016-10-13T00:00:00Z But soon after Isaac Newton constructed the first reflecting telescope later that century, mirrors took over: Astronomy today is dominated by telescopes with giant mirrors up to 10 meters wide. Fly-eyed lens array captures dim objects missed by giant telescopes 2021-03-25T04:00:00Z A latch to open the top when it stopped moving, and I was ready to attach the plastic tube — and make the longest, and last, reflecting telescope in history. It’s all my fault, or the Beanstalk sucks 2019-05-21T04:00:00Z As a child, he built model airplanes and spent days constructing a reflecting telescope. Roy Glauber, Nobel-winning physicist who applied quantum mechanics to optics, dies at 93 2018-12-30T05:00:00Z He observed the object using a 60-inch reflecting telescope located atop Mt Lemmon in the Santa Catalina mountains outside Tucson, Arizona. Saturday’s asteroid collision raises questions as to why we’re not funding detection efforts 2018-06-05T04:00:00Z The first successful reflecting telescope was built by Isaac Newton in 1668. Astronomy 2016-10-13T00:00:00Z With a field of view far greater than that of an equivalent reflecting telescope, Dragonfly promises to capture the dim glow of vast, tenuous gas clouds that hold clues to the universe’s unseen dark matter. Fly-eyed lens array captures dim objects missed by giant telescopes 2021-03-25T04:00:00Z The reflecting telescope, housed in the aircraft's fuselage, is over 8 feet in diameter. Star Trek's original Uhura is going on a NASA mission 2015-08-03T04:00:00Z Based on Isaac Newton's reflecting telescope design, a concave mirror focuses an image directly onto the Pi camera sensor, which is mounted onto components created by 3D printing. 3D printer telescope snaps moon pics 2014-09-19T04:00:00Z Shepherd says the same principle is also used in reflecting telescopes. How does a skyscraper melt a car? 2013-09-03T12:36:38Z In a reflecting telescope, the concave mirror is placed at the bottom of a tube or open framework. Astronomy 2016-10-13T00:00:00Z But existing plans to photograph extrasolar planets in this way involve orbiting arrays of reflecting telescopes all pointing in exactly the same direction. The search for alien life: Twinkle, twinkle, little planet 2012-06-07T15:06:09Z It may be applied to the open end of a reflecting telescope, either of the Newtonian or the Cassegrain construction.” Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" 2012-04-25T02:00:53.567Z He experimented in physical optics; took up astronomy in 1816; and in 1820, assisted by his father, he completed for a reflecting telescope a mirror of 18 in. diameter and 20 ft. focal length. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z But far and away the most famous reflecting telescope of all is the "Leviathan" of Lord Rosse, built at Birr Castle, Parsonstown, Ireland, about the middle of the last century. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z Since Newton’s time, when the sizes of the mirrors in telescopes were measured in inches, reflecting telescopes have grown ever larger. Astronomy 2016-10-13T00:00:00Z My first attempt at Daguerreotyping the moon was with a reflecting telescope; the mirror was five feet focus, and seven inches diameter. The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years 2012-02-15T03:00:30.577Z His mother laughed, but his father was deeply interested and helped the boy make a five-inch reflecting telescope which showed the satellites of Jupiter. Inventors 2012-02-08T03:00:16.647Z Hitherto we have said nothing about the great reflecting telescope, of 40 ft. focal length and 4 ft. aperture, the construction of which is often, though mistakenly, regarded as his chief performance. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z A reflecting telescope with silver-on-glass mirror 60 inches in diameter was first built by Ritchey and thoroughly tested by stellar photographs. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z In the 1890s, there was a major controversy about the relative quality of refracting and reflecting telescopes. Astronomy 2016-10-13T00:00:00Z Here is the death-mask of Sir Isaac Newton, and a reflecting telescope, on the model invented by him. Highways and Byways in Cambridge and Ely 2012-02-03T03:00:22.657Z With copper it forms a compound which takes a beautiful polish, not liable to tarnish, and is therefore used with advantage for mirrors of reflecting telescopes. Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry 2011-10-11T02:01:05.817Z One of Newton's inventions was a reflecting telescope—that is, a telescope in which a curved mirror was used in place of a lens. The Story of Great Inventions 2011-10-05T02:00:16.353Z These are called reflecting telescopes, because the image is reflected by metallic mirrors. Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained 2011-07-12T02:00:28.027Z If telescopes with significantly larger apertures were to be built, they would have to be reflecting telescopes. Astronomy 2016-10-13T00:00:00Z In 1668, when Newton was twenty-six, he constructed a small reflecting telescope, and soon a larger one, which he sent to the Royal Society; and was made a member of that body, in 1671. Famous Men of Science 2011-03-08T03:00:49.717Z In Fig. 43 trace out the corresponding parts in the mounting of a reflecting telescope. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z The first specimen of a reflecting telescope was constructed by Isaac Newton in 1668. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Those used in reflecting telescopes, are made of metal. Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained 2011-07-12T02:00:28.027Z People are often bothered when they discover that reflecting telescopes have a second mirror in the middle to bring the light out to an accessible focus where big instruments can be mounted. Astronomy 2016-10-13T00:00:00Z One carries a prism, another a reflecting telescope, a third is weighing the sun and planets with a steelyard, a fourth is employed about a furnace, and two others are loaded with money newly coined. Famous Men of Science 2011-03-08T03:00:49.717Z Ken had spent scores of hours observing the comet carefully, both by naked eye and with his 12-inch reflecting telescope. The Year When Stardust Fell When, with its giant reflecting telescope, photographs were taken of the region of Nova Persei after it had become comparatively faint, it was found that there was an extraordinarily faint nebulosity surrounding the star. Astronomical Discovery In reflecting telescopes, therefore, mirrors are used in order to bring the image nearer the eye; and a lens, or eye-glass, the same as in the refracting telescope, to magnify the image. Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained 2011-07-12T02:00:28.027Z The upper end of a reflecting telescope is open, and the light passes through to the mirror located at the bottom of the telescope. Astronomy 2016-10-13T00:00:00Z What's more, they were upside down, as is common in reflecting telescopes. The Flying Stingaree No, boy; because it is the step towards making an ellipse, or, as they call it when shaped for a reflecting telescope, a parabola. The Vast Abyss The Story of Tom Blount, his Uncles and his Cousin Sam Astronomers use convex lenses in some of their telescopes; in others, called reflecting telescopes, they use concave mirrors. Common Science Under the great dome there was the latticework of a huge reflecting telescope; strange pigmy figures scuttled here and there, working at curious machines. The Copper-Clad World It is in this way that images are formed at the focus of the mirror of a reflecting telescope. 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 made with his own hands 430 parabolic mirrors for reflecting telescopes, besides a great number of complete instruments. Pioneers of Science The reflecting telescope, however, had in turn certain drawbacks of its own. Astronomy of To-day A Popular Introduction in Non-Technical Language Observations were made of transits of Mercury and Venus, and refracting and reflecting telescopes were invented. The Astronomy of Milton's 'Paradise Lost' At length, after repeated failures, he found himself provided with a reflecting telescope—a 5-1/2-foot Gregorian—of his own construction. A Popular History of Astronomy During the Nineteenth Century Fourth Edition From this follows the most striking difference in the method of using refracting and reflecting telescopes. 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 first reflecting telescope he made was 1 in. diameter and 6 in. long, and magnified forty times. Pioneers of Science It is to Sir Isaac Newton that the world is indebted for the reflecting telescope in its best form. Astronomy of To-day A Popular Introduction in Non-Technical Language This remark does not apply to a reflecting telescope, as this instrument conducts all the rays to a common focus. The Story of the Heavens The reflecting telescope came into existence and reached maturity on British soil. A Popular History of Astronomy During the Nineteenth Century Fourth Edition This time it is a reflecting telescope that you hold in your hands. 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 communicated to them an account of his reflecting telescope, and presented them with the instrument. Pioneers of Science These direct-view forms of the reflecting telescope were much in vogue about the middle of the eighteenth century, when many beautiful examples of Gregorians were made by the famous optician, James Short, of Edinburgh. Astronomy of To-day A Popular Introduction in Non-Technical Language It then chanced that George III., of Great Britain, was pleased to send as a present to the Empress Catharine of Russia a ten-foot reflecting telescope constructed by Sir William Herschel. The Story of the Heavens The reflecting telescope, preserved along with the dial, was made by Newton in his thirtieth year, and reminds us of the deep mathematical studies he was then pursuing at Cambridge. Great Men and Famous Women. Vol. 4 A series of pen and pencil sketches of the lives of more than 200 of the most prominent personages in History This heart of ours is like a reflecting telescope, the least breath upon the mirror of which will cause all the starry sublimities that it should shadow forth to fade and become dim. Expositions of Holy Scripture Ephesians; Epistles of St. Peter and St. John So he made a larger one, now in the library of the Royal Society, London, with an inscription: "The first reflecting telescope, invented by Sir Isaac Newton, and made with his own hands." Pioneers of Science We have given the Newtonian form as an example of the principle of the reflecting telescope. Astronomy of To-day A Popular Introduction in Non-Technical Language Neptune, like our earth, is attended by a single satellite; this delicate object was discovered by Mr. Lassell with his two-foot reflecting telescope shortly after the planet itself became known. The Story of the Heavens He became professor of mathematics at St Andrews and later at Edinburgh, and invented the first successful reflecting telescope. A Budget of Paradoxes, Volume I In this way the principle is employed in reflecting telescopes. Practical Mechanics for Boys Early in 1672 he was elected a Fellow of the Royal Society, and communicated his researches in optics, his reflecting telescope, and his discovery of the compound nature of white light. Pioneers of Science The Planet Jupiter The Giant Planet as seen at 11.30 p.m., on the 11th of January, 1908, with a 12½-inch reflecting telescope. Astronomy of To-day A Popular Introduction in Non-Technical Language In the hands of Herschel, it was found possible to construct reflecting telescopes of manageable dimensions, which were both more powerful and more accurate than the long-focussed lenses of Cassini. The Story of the Heavens The building was last remodeled and enlarged in 1911 when a reflecting telescope, with a 37-5/8 inch parabolic mirror, largely made in the shops of the University, was installed. The University of Michigan The mirror for the huge reflecting telescope was nearly three hundred inches in diameter, and was powerful enough to spot a spaceship leaving Sator. Islands of Space The great 100-inch reflector of the Mount Wilson reflecting telescope—the largest reflecting instrument in the world—weighs nearly 9,000 pounds and the moving parts of the telescope weigh about 100 tons. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told The instrument used was a 28–inch reflecting telescope, and the time of exposure was fifteen minutes. Astronomy of To-day A Popular Introduction in Non-Technical Language On the memorable evening I was engaged in my usual duty at that time of observing nebulæ with Lord Rosse's great reflecting telescope. The Story of the Heavens On turning his 18-inch reflecting telescope to a part of the Milky Way in Orion, he found its whitish appearance to be completely resolved into small stars, not separately seen with his former telescopes. The New Heavens After work was well organized, Mr. Crossley, of England, presented the observatory with a reflecting telescope of large size, but which had never gained a commanding reputation. The Reminiscences of an Astronomer Opticians had given up, more from theory than from careful experiments, attempting high magnifying powers, even for reflecting telescopes. Biographies of Distinguished Scientific Men Under his auspices the reflecting telescope reached its maximum of power and usefulness. Notable Events of the Nineteenth Century Great Deeds of Men and Nations and the Progress of the World Of late years reflecting telescopes have been generally made with mirrors of glass covered with a thin film of silver, which is capable of reflecting much more light than the surface of a metallic mirror. The Story of the Heavens It would be interesting to trace the long contest for supremacy between refracting and reflecting telescopes, each of which, at certain stages in its development, appeared to be unrivalled. The New Heavens And yet reflecting telescopes had not, as a rule, been successful in permanent practical work. The Reminiscences of an Astronomer So George Clark made up his mind that he would make a reflecting telescope; that is, one with a mirror in it. Stories of American Life and Adventure Following the line of his father, he used the reflecting telescope, and it was an instrument of this kind that he took to his observatory at the Cape of Good Hope. Notable Events of the Nineteenth Century Great Deeds of Men and Nations and the Progress of the World People are naturally awaiting the latest news from the giant refracting and reflecting telescopes of the day. Scientific American Supplement, No. 832, December 12, 1891 Here is one of the chief sources of interest in the possibilities of a 100-inch reflecting telescope. The New Heavens A reflecting telescope, of two feet focal length, by ditto. A General History and Collection of Voyages and Travels — Volume 14 After Mr. Clark had made this little telescope, he made larger reflecting telescopes that were very powerful. Stories of American Life and Adventure In the reflecting telescope, however, there are necessary limitations. Notable Events of the Nineteenth Century Great Deeds of Men and Nations and the Progress of the World From 1842-45 he was engaged upon the construction, in his park at Parsonstown, of his great reflecting telescope 58 feet long. The Glories of Ireland I think it was about the year 1868 that I began to make a reflecting telescope. Men of Invention and Industry I now resolved to construct a reflecting telescope of considerably greater power than that which I possessed. James Nasmyth: Engineer; an autobiography He had already spent a great part of his money trying to make good reflecting telescopes; but he made up his mind to give them up, and try to make a better kind. Stories of American Life and Adventure His employer, Mr. George Dickinson, also seems to have bought his reflecting telescope from him for the sum of 12L. Industrial Biography, Iron Workers and Tool Makers This gentleman was at the time Professor of Medicine in King's College, Aberdeen, and son of Dr. James Gregory, distinguished in science as the inventor of the reflecting telescope. Rob Roy — Volume 01 In the factory yard was the commencement of the Observatory for Greenwich, to contain the late Mr. Lassell's splendid two feet Newtonian reflecting telescope, which has been presented to the nation. Men of Invention and Industry When in his twenty-first year he began constructing reflecting telescopes for himself. James Nasmyth: Engineer; an autobiography Even the wooden framework of the reflecting telescope which he used was painted a brilliant red. Maria Mitchell: Life, Letters, and Journals But the work of taking these photographs is so great, and the number of reflecting telescopes which can be applied to it so small, that no one has ventured to seriously commence it. Side-Lights on Astronomy and Kindred Fields of Popular Science Such is the principle of the famous reflecting telescope which bears the name of Newton. Great Astronomers In course of time an extraordinary ambition took possession of him: no less than the construction of a reflecting telescope of six inches diameter. Men of Invention and Industry He had acquired much technical skill in the construction of reflecting telescopes, and the companionship between us was thus rendered very agreeable. James Nasmyth: Engineer; an autobiography Every evening he had studied the sky from his narrow yard, which resulted curiously in the gift in later years of a great reflecting telescope to a famous university. The Financier, a novel This demonstration of what the reflecting telescope can do may be regarded as one of the most important discoveries of our time as to the capabilities of astronomical instruments. Side-Lights on Astronomy and Kindred Fields of Popular Science A reflecting telescope of the present day would not be fitted with a mirror composed of that alloy known as speculum metal, whose composition I have already mentioned. Great Astronomers His perseverance was rewarded by the possession of a 3 1/2 inch speculum, which by his rare skill he worked into a reflecting telescope of very good quality. Men of Invention and Industry I had obtained a sufficient amount of technical knowledge to construct in 1827 a small but very effective reflecting telescope of six inches diameter. James Nasmyth: Engineer; an autobiography But about the year 1670 Newton constructed his first reflecting telescope, which was greatly superior to, although much smaller than, the telescopes then in use. A History of Science — Volume 2 This difficulty is avoided in the reflecting telescope; but a new difficulty is found in the bending of the mirror under the influence of its own weight. Side-Lights on Astronomy and Kindred Fields of Popular Science It was the mirror of a reflecting telescope which was in progress. James Nasmyth: Engineer; an autobiography I exhibited to him my apparatus for obtaining sound castings of specula for reflecting telescopes. James Nasmyth: Engineer; an autobiography Three years later I initiated Mr. Maudslay into the art and mystery of making a reflecting telescope. James Nasmyth: Engineer; an autobiography I daresay you may remember the first occasion on which I saw a reflecting telescope, which was then being tried on the sun in a pattern loft at Patricroft. James Nasmyth: Engineer; an autobiography He would sit down in my workshop, and see me go through the various technical processes of casting, grinding, and polishing specula for reflecting telescopes. James Nasmyth: Engineer; an autobiography Having made a wooden pattern for my intended 8-inch diameter speculum, and moulded it in sand, I cast this my first reflecting telescope speculum according to the best book instructions. James Nasmyth: Engineer; an autobiography I know of no subject connected with the pursuit of science which so abounds with exciting and delightful interest as that of constructing reflecting telescopes. James Nasmyth: Engineer; an autobiography I suggested to him the employment of a reflecting telescope, by means of which the difficulties connected with the employment of glass could be avoided. James Nasmyth: Engineer; an autobiography |
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