贪心
发表于 2025-3-25 04:52:00
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休闲
发表于 2025-3-25 11:34:41
Deutsche Gesellschaft für Chirurgieiptic would then see the Sun, Moon and Earth in a straight line. Despite this, the shadow cast by the Moon rarely touches the Earth. Because of the inclination of its orbit, at the time of New Moon the Moon is usually above or below the Earth’s orbital plane, so its shadow misses the Earth. The Moon
泰然自若
发表于 2025-3-25 11:39:17
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jet-lag
发表于 2025-3-25 16:04:21
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frivolous
发表于 2025-3-25 22:32:15
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无可争辩
发表于 2025-3-26 00:19:48
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有害处
发表于 2025-3-26 07:50:45
Introduction,ested in astronomy have such equipment at their disposal. This prompts the idea of using these computers for astronomical computation. What positive advantages are there in using one’s own computer, when one can obtain all the most important data required for observing, fully as accurately, in one o
obviate
发表于 2025-3-26 10:25:38
Coordinate Systems,tric coordinates, which are based on the Sun, and geocentric coordinates, which are centred on the Earth. Ecliptic coordinates refer the position of a point to the plane of the Earth’s orbit, while equatorial coordinates are measured relative to the position of the Earth’s or celestial equators. The
图表证明
发表于 2025-3-26 16:06:50
Calculation of Rising and Setting Times,h’s axis. Neither of these systems is particularly suitable, however, for an observer situated on the surface of the Earth. As such an observer (without being aware of it) takes part in the Earth’s daily rotation, it appears as if the Sun, Moon, and stars follow large arcs across the sky from East t
extinct
发表于 2025-3-26 18:21:57
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