trace-mineral 发表于 2025-3-21 19:44:04

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倾听 发表于 2025-3-21 21:59:41

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先锋派 发表于 2025-3-22 02:16:12

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indicate 发表于 2025-3-22 07:51:47

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处理 发表于 2025-3-22 11:41:37

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Diuretic 发表于 2025-3-22 16:16:44

Personalführung in Medizinbetriebenmean solar time, the rotational period of the Earth.. A satellite with these properties is called a .; it remains stationary over a particular point on the Earth’s equator, to provide continuous relay of television and telecommunications to a wide area within direct sightlines of the satellite.

Diuretic 发表于 2025-3-22 20:58:18

Measuring Lunar Mountains,at the margins of the maria and in centers and raised walls of craters. The actual heights of lunar mountains are similar to those of Earth but as a percentage of global diameter, the lunar mountains are proportionately higher.

HERE 发表于 2025-3-22 22:42:54

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CONE 发表于 2025-3-23 01:57:45

Earth Satellites,mean solar time, the rotational period of the Earth.. A satellite with these properties is called a .; it remains stationary over a particular point on the Earth’s equator, to provide continuous relay of television and telecommunications to a wide area within direct sightlines of the satellite.

FOLLY 发表于 2025-3-23 07:16:43

,The Moon’s Orbit,ce the Moon’s orbit is further complicated mainly, though not exclusively, by the circumstance that it is in a three-body system. The Sun is the principal perturber of the lunar orbit; two of the other sources of perturbations are the nonspherical shape of the Earth and the gravitational attraction of the other planets.
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查看完整版本: Titlebook: Challenges of Astronomy; Hands-on Experiments W. Schlosser,T. Schmidt-Kaler,E. F. Milone Textbook 1991 Springer-Verlag New York Inc. 1991 a