| 单词 | ephemeris |
| 例句 | "Getting better orbits... particularly for the two planets that dominate the dynamics of our solar system, Jupiter and Saturn, improves the basis of the entire ephemeris," Dr Jones said. Saturn pinpointed to within one mile 2015-01-09T05:00:00Z This is the offset to apply to Chariklo’s ephemeris to fit the observations. A ring system detected around the Centaur (10199) Chariklo 2014-04-04T18:25:37.267Z GPS’s battery draining behavior is most noticeable during the initial acquisition of the satellite’s navigation message: the satellite’s state, ephemeris, and almanac. Why Does GPS Use More Battery Than Any Other Antenna Or Sensor In A Smartphone? 2013-08-06T16:04:00Z The astronomical ephemeris is the last outcome of their productive genius.” Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z The pictorial journalism of the "Comic Almanacks" is often delicious; no ephemerides, in my knowledge, equal them in sustained humorous effect. George Cruikshank 2011-12-18T03:00:20.137Z An ephemeris is a table of predicted locations in space. Saturn pinpointed to within one mile 2015-01-09T05:00:00Z JPL releases a dynamical ephemeris, or DE, every so often, upgrading the system with new information much the way software developers update a computer's operating system to add new features as well as increase stability. Where's Saturn? Cassini Spacecraft Helping Provide More Accurate Planetary Coordinates 2011-02-01T14:15:26.617Z Two systems of eclipse elements are now adopted in the ephemerides and tables; the one, that of F.W. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" 2011-01-19T03:00:19.027Z Such tables are used in the offices of the national Ephemerides to construct ephemerides of the several planets, showing their exact positions in the sky from day to day. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" The vital ideas of the present danced by in thin-winged progress unperceived, or rather perceived as bloodless and irresolute ephemerides. Sinister Street, vol. 2 And now not only is it slightly off course, but so is every ephemeris printed on Mert. Conquest Over Time To the end of a long life, she played an almost sovereign part, so that in the ephemerides of Hawaii, the progresses of Kaahumanu are chronicled along with the deaths and the accessions of kings. The Works of Robert Louis Stevenson - Swanston Edition Vol. 18 (of 25) This is a stellar ephemeris, just as packed with facts as an egg is with meat. The Ethical Engineer From the resulting elements of the orbit the positions of the body from day to day may be computed and tabulated in an ephemeris for the use of observers. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Armed with these novel powers, he set to work; and the communication in November of his elements and ephemeris for the lost object revived the drooping hopes of the little band of eager searchers. A Popular History of Astronomy During the Nineteenth Century Fourth Edition Those in Pepys's library at Cambridge are of much later date, yet of some no duplicates can be quoted, so vast has been the destruction of these ephemerides. The Book-Collector A General Survey of the Pursuit and of those who have engaged in it at Home and Abroad from the Earliest Period to the Present Time Those used for lunar computations in the nautical ephemeris. 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. He checked the time with the satellite ephemeris. Pushbutton War He also got a quadrant and compass into the boat; but was forbidden, on pain of death, to touch either map, ephemeris, book of astronomical observations, sextant, time-keeper, or any of my surveys or drawings. A Narrative Of The Mutiny, On Board His Majesty's Ship Bounty; And The Subsequent Voyage Of Part Of The Crew, In The Ship's Boat He will find that these same data, after being partially adopted in the ephemeris for 1900, were thrown out in 1901, and the antiquated ones reintroduced in the main body of the ephemeris. The Reminiscences of an Astronomer Lord Crawford has printed a catalogue of his Proclamations, and in the writer's Collections, 1867-92, occur thousands of these ephemerides arranged under what appeared to be their appropriate heads. The Book-Collector A General Survey of the Pursuit and of those who have engaged in it at Home and Abroad from the Earliest Period to the Present Time I take, for example, the ephemeris for the year 1901, and I look under the heading "Jupiter" on page 239, for the month of July. Other Worlds Their Nature, Possibilities and Habitability in the Light of the Latest Discoveries France," he says, "created more than two centuries ago the most ancient nautical ephemerides in existence. International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the Proceedings For instance, under the entry newspaper occurs the attractive word ephemeris. Public Speaking In consequence I had no legal right to go on with the former, although the ephemerides of Europe were waiting for the results. The Reminiscences of an Astronomer In the present day, the nautical ephemerides contain, several years in advance, the indication of the times of the eclipses and reappearances of Jupiter's satellites. Biographies of Distinguished Scientific Men Those who, after all, may not care to consult the ephemeris in order to find the planets, may be able to locate them, simply from a knowledge of their situation among the constellations. Other Worlds Their Nature, Possibilities and Habitability in the Light of the Latest Discoveries Now, I gather from Professor Adams' remarks that upon this question the ephemerides which we now employ have some important bearing. International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the Proceedings These ephemerides of politics are not made for our slow and coarse understandings. The Works of the Right Honourable Edmund Burke, Vol. 06 (of 12) He will find the foreign ephemerides using uniform data worked out in the office of the "American Ephemeris and Nautical Almanac" at Washington for the years beginning with 1901. The Reminiscences of an Astronomer Unfortunately, Such are the perturbations to which a woman's orbit is exposed that no masculine astronomy can construct its ephemeris. Hints for Lovers At the present day the nautical ephemerides contain, several years in advance, the indications of the times of the eclipses and reappearances of Jupiter's satellites. Library of the World's Best Literature, Ancient and Modern — Volume 2 The requisite changes in the astronomical and nautical ephemerides would be easily made. International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the Proceedings Slightly as they have considered their subject, I think this can hardly have escaped the writers of political ephemerides for any month or year. The Works of the Right Honourable Edmund Burke, Vol. 06 (of 12) The first appropriation for an American ephemeris and nautical almanac was made by Congress in 1849. The Reminiscences of an Astronomer Men were nothings, mere animalculae, mere ephemerides that fluttered and fell and were forgotten between dawn and dusk. The Octopus : A story of California Gauss published an approximate ephemeris of probable positions when the planet should emerge from the sun’s light. History of Astronomy To avoid any chance of mistake, it should be prominently stated on each page of the ephemerides that mean time reckoned from mean midnight is kept throughout. International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the Proceedings They sell in Persia an annual almanac called Tacuim, which is properly an ephemeris containing the longitude and latitude of the planets, their conjunctions and oppositions, and other such matter. The Travels of Marco Polo — Volume 1 The leading nations publish ephemerides of this sort. The Reminiscences of an Astronomer The flying ephemerides enveloped us like a vaporous eddy. The Queen Pedauque The computation of their perturbations and ephemerides by Euler’s and Lagrange’s method of variable elements became so laborious that Encke devised a special process for these, which can be applied to many other disturbed orbits. History of Astronomy It, perhaps, may be important to remark that we could not introduce this change immediately, since the ephemerides are already computed and published for three or four years in advance. International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the Proceedings It was Behaim who introduced to the Portuguese the improved ephemerides calculated by the German Regiomontanus, and printed at Nuremberg in 1474. American Nation: a history — Volume 1: European Background of American History, 1300-1600 I volunteered to test this question by looking at the ephemerides of all the small planets in the neighborhood of Mars. The Reminiscences of an Astronomer To recognize it, it is necessary to have an astronomical ephemeris showing its right ascension and declination, and star maps showing where the parallels of right ascension and declination lie among the stars. Side-Lights on Astronomy and Kindred Fields of Popular Science We should all turn into flaming ephemerides, fluttering about the crater of a perpetually active volcano. The Witch of Prague The evil of the time is the multiplication of ephemerides. New Grub Street In sending me the ephemeris of the two moons of Mars, which he revealed to this world of ours, he wrote, "The smaller of these moons is the veritable Brick Moon." The Brick Moon and Other Stories A diagram representing the elliptical orbit of the planet, accompanied by an ephemeris made out in minute detail, had been drawn out by the professor. Off on a Comet! a Journey through Planetary Space To do this successfully, and without waste of time, it is necessary to have an astronomical ephemeris for the year. Side-Lights on Astronomy and Kindred Fields of Popular Science Of the regular annual ephemerides the earliest, so far as I am aware, is the Connaissance des Temps or French Nautical Almanac. Side-Lights on Astronomy and Kindred Fields of Popular Science The third class of data in the ephemeris comprises phenomena to be predicted and observed. Side-Lights on Astronomy and Kindred Fields of Popular Science The mere preparation of the ephemeris includes but a small part of the work of mathematical calculation and investigation required in astronomy. Side-Lights on Astronomy and Kindred Fields of Popular Science As it is the oldest, so, in respect at least to number of pages, it is the largest ephemeris of the present time. Side-Lights on Astronomy and Kindred Fields of Popular Science In explaining it, I will take the ephemeris as it now is, with the small changes which have been made from time to time. Side-Lights on Astronomy and Kindred Fields of Popular Science The preceding are the principal astronomical and nautical ephemerides of the world, but there are a number of minor publications, of the same class, of which I cannot pretend to give a complete list. Side-Lights on Astronomy and Kindred Fields of Popular Science An old ephemeris, and one well known in astronomy is that published by the Observatory of Milan, Italy, which has lately entered upon the second century of its existence. Side-Lights on Astronomy and Kindred Fields of Popular Science Another part of the ephemeris gives the position of the heavenly bodies, not at equidistant intervals, but at transit over some meridian. Side-Lights on Astronomy and Kindred Fields of Popular Science The astronomical part of our ephemeris, therefore, gives the positions of the principal fixed stars, the sun, moon, and all the larger planets at the moment of transit over our own meridian. Side-Lights on Astronomy and Kindred Fields of Popular Science His tables of the moon are those now used for predicting the places of the moon in all the ephemerides of the world. Side-Lights on Astronomy and Kindred Fields of Popular Science As a consequence of the several difficulties and drawbacks, when the computation of our ephemeris was started, in the year 1849, there were no tables which could be regarded as really satisfactory in use. Side-Lights on Astronomy and Kindred Fields of Popular Science Commencing with the ephemeris for the year 1883, Hansen's tables are introduced with corrections to the mean longitude founded on two centuries of observation. Side-Lights on Astronomy and Kindred Fields of Popular Science In one direction, however, our ephemeris will hereafter be far ahead of all others. Side-Lights on Astronomy and Kindred Fields of Popular Science The rule adopted, therefore, is to have all the ephemerides which refer to absolute time, without any reference to a meridian, given for Greenwich noon, unless there may be some special reason to the contrary. Side-Lights on Astronomy and Kindred Fields of Popular Science Subsequent ephemerides were prepared with more practical objects. Side-Lights on Astronomy and Kindred Fields of Popular Science It may be interesting to say something of the tables and theories from which the astronomical ephemerides are computed. Side-Lights on Astronomy and Kindred Fields of Popular Science One of the purposes of any ephemeris, and especially of that of the navigators, is to give the position of the heavenly bodies at equidistant intervals of time, usually one day. Side-Lights on Astronomy and Kindred Fields of Popular Science Since it is noon at some point of the earth all the time, it follows that such an ephemeris will always be referred to noon at some meridian. Side-Lights on Astronomy and Kindred Fields of Popular Science The equation of time and the sidereal time of mean noon complete the ephemeris proper. Side-Lights on Astronomy and Kindred Fields of Popular Science At first they were not regular, annual publications, issued by governments, as at the present time, but the works of individual astronomers who issued their ephemerides for several years in advance, at irregular intervals. Side-Lights on Astronomy and Kindred Fields of Popular Science All the matter is given by months, as in the solar and lunar ephemeris of our own and the British Almanac. Side-Lights on Astronomy and Kindred Fields of Popular Science Like other publications of this sort this ephemeris has gradually increased in volume. Side-Lights on Astronomy and Kindred Fields of Popular Science When our ephemeris was first commenced, the corrections applied to existing tables rendered it more accurate than any other. Side-Lights on Astronomy and Kindred Fields of Popular Science Since that time, the introduction into foreign ephemerides of the improved tables of Le Verrier have rendered them, on the whole, rather more accurate than our own. Side-Lights on Astronomy and Kindred Fields of Popular Science |
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