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  1. The size of the moon is sixth of the Earth. It's rotation and revolution...

  2. 月球的質量 : 7.3477 × 1022公斤 直徑 = 平均半徑 X 2 = 1,737.10公里 x 2 = 3474.2公里 公轉週期 和 自轉週期 都是 27.321582天 表面的最高 和 最低温度 : 390K(116.85攝氏) 和70K(-203.15攝氏) 有大氣層 : 主要成分氫和一些惰性氣體(如氬, 氡, 氦) 表面地形 : 南北極稍扁、赤道稍許隆起...

  3. 木星。(至少68顆,其中一顆未通過) 附加知識 1.木星還is太陽系中體積最大、自轉最快的行星 2.木星的主要衛星only FOUR! 3.木星的衛星有8顆屬於規則衛星 55顆衛星是小型的不規則衛星 5顆衛星未通過

  4. ... 2 on Aug 25 1989. Almost everything we know about Neptune comes from this one visit. It has 8 known moons . Most of the Moon 's surface is...

  5. ... astronomer Simon Marius claimed to have seen the moons around the same time, but he did not publish his observations...

  6. ...predominantly ancient cratered highlands somewhat similar to the Moon . In contrast, most of the northern hemisphere consists... is known only by inference from data about the surface and the bulk statistics of the planet. The...

  7. ...model Earth would be about 1.3 cm in diameter (the size of a grape). The Moon would be about 30 cm ( about a foot) from the Earth. The Sun would be 1.5...

  8. ... simple telescope they started to know about planets and stars and other things...area of galaxies, stars, planets, moons and clusters, black holes along with much people...

  9. ... to study this small, cold, distant world and its companion moon , Charon. Most of what we know about Pluto we have learned since the late 1970s from Earth-...

  10. ...weight. The weight of a person on another heavenly body, eg the moon , is different and depends on the gravitational force of it. As gravity is less ( about one sixth that of the earth), a person's weight is...