| 单词 | celestial equator |
| 例句 | Sample questions include: What is the Sun’s greatest distance from the celestial equator? Astrology Is Hard, Even if It’s Fake 2018-10-17T04:00:00Z Fall officially kicks off Friday at 11:50 p.m. with the fall equinox, the moment the sun crosses the celestial equator, an imaginary line above earth’s equator. Seattle weather forecast: Enjoy the sunshine before rain — and more rain 2023-09-21T04:00:00Z Standing by the Hunter’s foot, the Great Dog is an easy-to-find constellation visible from most areas of the world, thanks to being positioned just south of the celestial equator. 5 famous constellations that (almost) anyone can find 2023-08-23T04:00:00Z And whereas Ptolemy based his coordinate system on the ecliptic, Hipparchus used the celestial equator, a system more common in modern star maps. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z The celestial equator, 90° from the celestial poles, would lie along your horizon. Astronomy 2016-10-13T00:00:00Z Each day, the sun rises in an easterly direction, approaches some maximum height relative to the celestial equator, and sets in a westerly direction. Algebra and Trigonometry 2015-02-13T00:00:00Z This makes the sun appear at its farthest below the celestial equator when viewed from Earth. Happy solstice! It still feels dark in the Seattle area, but longer days are coming 2021-12-21T05:00:00Z Orion straddles the celestial equator, so it is well known to observers in both the Northern and Southern Hemispheres and holds the record for containing the most bright stars in one stellar pattern. 5 famous constellations that (almost) anyone can find 2023-08-23T04:00:00Z At the instant of the equinox — and it’s only an instant — the sun will beam directly above the celestial equator, that imaginary line that divides the planet in two. What to know about the autumnal equinox as the days shorten before our eyes 2021-09-21T04:00:00Z Is the ecliptic the same thing as the celestial equator? Astronomy 2016-10-13T00:00:00Z The celestial equator is an imaginary line that divides the visible universe into two halves in much the same way Earth’s equator is an imaginary line that divides the planet into two halves. Algebra and Trigonometry 2015-02-13T00:00:00Z On this day, the sun crosses the celestial equator – "the imaginary line in the sky above the Earth’s equator – from south to north," the National Weather Service in Jackson, Mississippi explained in a tweet. First day of spring arrives: 5 things to know about the vernal equinox 2019-03-19T04:00:00Z This causes the sun to appear at its farthest below the celestial equator when viewed from Earth. What you need to know about Winter Solstice 2016-12-20T05:00:00Z Up in the heavens, the sun will cross the celestial equator. City Room: New York Today: Dawn of Spring 2014-03-20T10:00:10Z At the vernal and autumnal equinoxes, the Sun is on the celestial equator and we get about 12 hours of day and night. Astronomy 2016-10-13T00:00:00Z What happens on March 20 is that the sun moves from south of the celestial equator to north of the equator. Vernal Equinox Marks First Day of Spring Today 2013-03-20T17:45:05.467Z At the date 3400 B.C. the celestial equator ran along the whole length of the constellation Hydra, nearly through Procyon, and a little north of the bright red star Antares. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z They are so distributed as to be most numerous in a zone inclined about 18 degrees to the celestial equator, and split in two near where the cleft in the Galaxy is located. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z In astronomy the declination is the angular distance, as seen from the earth, of a heavenly body from the celestial equator, thus corresponding with terrestrial latitude. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 10 "David, St" to "Demidov" 2012-02-17T03:00:33.923Z Only that half of the sky north of the celestial equator is ever visible to an observer at the North Pole. Astronomy 2016-10-13T00:00:00Z This method would be correct were it not that a change in the planet’s declination or angular distance from the celestial equator might render the conclusions incorrect. Astronomical Lore in Chaucer 2011-10-13T02:00:42.860Z Appropriately to its name, it covers a large expanse of the heavens, its northern portion, just to south-west of Orion, reaching the celestial equator. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z In astronomy, the “celestial equator” is the name given to the great circle in which the plane of the terrestrial equator intersects the celestial sphere; it is consequently equidistant from the celestial poles. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" 2011-02-27T03:00:31.973Z The Declination of a star is its angular distance north or south of the celestial equator. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z The celestial poles, being 90° from the celestial equator, must then be at the north and south points on your horizon. Astronomy 2016-10-13T00:00:00Z This great circle on the celestial sphere is called the celestial equator, or, by an older name, the equatorial, the significance of which we shall see presently. Astronomical Lore in Chaucer 2011-10-13T02:00:42.860Z There is also a corresponding celestial equator in the plane of the terrestrial, an imaginary great circle in the heavens the plane of which is perpendicular to the axis of the earth. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z Since the sun moves in the ecliptic, it is in the last-named sense the point of intersection of the ecliptic and the celestial equator. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" 2011-02-27T03:00:31.973Z This is done by the use of the + and - signs, a + denoting that the star lies north of the celestial equator, i. e., toward Polaris. A Text-Book of Astronomy 2011-01-05T03:00:57.347Z Recall from the section on celestial poles and the celestial equator that the north celestial pole is just the projection of Earth’s North Pole into the sky. Astronomy 2016-10-13T00:00:00Z The path of such a star is represented in Figure 2 by the great circle EMWM′, which also represents the celestial equator. Astronomical Lore in Chaucer 2011-10-13T02:00:42.860Z The stars in a part of the sky known as the "celestial equator", move constantly from east to west but they always rise due east and set due west. Natural navigator 2010-03-18T08:23:00Z The ecliptic intersects the celestial equator at two opposite points, the equinoxes, at an angle of 23� 27′. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" The second is the great watersnake, Hydra, which 4600 years ago stretched for 105° along the celestial equator of that day. The Astronomy of the Bible An Elementary Commentary on the Astronomical References of Holy Scripture In December, when the Sun is south of the celestial equator, the situation is reversed. Astronomy 2016-10-13T00:00:00Z Then the zenith would be on the celestial equator and the north and south poles of the heavens would be on the horizon. Astronomical Lore in Chaucer 2011-10-13T02:00:42.860Z This stelliferous zone almost completely encircles the sphere, which it divides into two nearly equal parts, and is inclined at an angle of 63� to the celestial equator. The Astronomy of Milton's 'Paradise Lost' The posterior section is joined on to it at right angles, and presents the object-glass, accordingly, to the celestial equator, in the plane of which it revolves. A Popular History of Astronomy During the Nineteenth Century Fourth Edition The declination of a celestial body is its angular distance N or S of the celestial equator or equinoctial. Lectures in Navigation At this time, the Sun is at a declination of 23° N of the celestial equator, and the corresponding latitude on Earth is 23° N of the equator. Astronomy 2016-10-13T00:00:00Z We have still to define a great circle of the celestial sphere that is of equal importance with the celestial equator and the celestial horizon. Astronomical Lore in Chaucer 2011-10-13T02:00:42.860Z The celestial equator divides the heavens into two hemispheres—the northern and the southern. 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. It proved to be the planet Uranus. ζ is almost exactly on the celestial equator. λ is a red star, the most prominent of the first stars in the stream. A Field Book of the Stars Now get clearly in your mind how we measure the angular distance from the celestial equator of any heavenly body. Lectures in Navigation The ecliptic does not lie along the celestial equator but is inclined to it at an angle of about 23.5°. Astronomy 2016-10-13T00:00:00Z The measurements that correspond in astronomy to terrestrial latitude and longitude are called declination and right ascension and are obviously made with reference to the celestial equator, not the ecliptic. Astronomical Lore in Chaucer 2011-10-13T02:00:42.860Z Extended to the heavens, it forms a circle called the celestial equator, which in like manner divides the heavens into two equal parts, the northern and southern hemispheres. 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. Referring to the time when the sun passes the celestial equator. The Wonder Island Boys: The Tribesmen In other words, that is the ship's longitude for, as mentioned before, longitude is the distance East or West of Greenwich that any point is, measured on the arc of the celestial equator. Lectures in Navigation In June, the Sun is north of the celestial equator and spends more time with those who live in the Northern Hemisphere. Astronomy 2016-10-13T00:00:00Z For taking these measurements astronomers employ circles on the celestial sphere perpendicular to the plane of the celestial equator and passing through the poles of the heavens. Astronomical Lore in Chaucer 2011-10-13T02:00:42.860Z We may remark that the main part of the zodiacal light shifts to the south side of the celestial equator as we cross the line. The Andes and the Amazon Across the Continent of South America Now it is necessary first to know the position of the ecliptic with reference to the celestial equator. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. The Declination of any point in the celestial sphere is its distance in arc, North or South of the celestial equator, i.e., Lectures in Navigation Halfway between the solstices, on about March 21 and September 21, the Sun is on the celestial equator. Astronomy 2016-10-13T00:00:00Z Right ascension, corresponding to terrestrial longitude, is the angular distance of a heavenly body from the vernal equinox measured on the celestial equator eastward to the hour circle passing through the body. Astronomical Lore in Chaucer 2011-10-13T02:00:42.860Z Polaris is now the nearest conspicuous star to the north pole of the celestial equator. Essays by Ralph Waldo Emerson Declination, the angular distance of a celestial body north or south from the celestial equator. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work If you are in 40� N. latitude, the celestial equator would intersect the celestial sphere at a point 40� South of you. Lectures in Navigation As a result, North Americans and Europeans see the Sun north of the celestial equator and high in our sky in June, and south of the celestial equator and low in the sky in December. Astronomy 2016-10-13T00:00:00Z When the sun is south of the celestial equator its apparent daily path is the same as it would be for a star so situated. Astronomical Lore in Chaucer 2011-10-13T02:00:42.860Z These effects are most dramatic at Earth’s poles, where the Sun actually can be seen more than a week before it reaches the celestial equator. Astronomy 2016-10-13T00:00:00Z When the plane of this is extended to the heavens, the line of contact is called the celestial equator. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work If that were so, and imagine for a minute that it is so, then it would be exactly 90� from the Pole Star to the celestial equator. Lectures in Navigation At the North Pole, all celestial objects that are north of the celestial equator are always above the horizon and, as Earth turns, circle around parallel to it. Astronomy 2016-10-13T00:00:00Z Halfway between the celestial poles, and thus 90° from each pole, is the celestial equator, a great circle on the celestial sphere that is in the same plane as Earth’s equator. Astronomy 2016-10-13T00:00:00Z Hence if you stood at the equator, your zenith would be in the celestial equator and your true horizon would exactly cut the Pole Star. Lectures in Navigation |
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