推荐回答（3个）
下边是与太阳的距离的星水星 距太阳 57,910,000 千米
金星 距太阳 108,200,000 千米
地球 149,600,000 千米
火星 离太阳227,940,000 千米
木星 距太阳 778,330,000 千米
土星 距太阳 1,429,400,000 千米
天王星 距太阳2,870,990,000 千米
海王星 距太阳 4,504,000,000 千米
冥王星 离太阳平均距离5,913,520,000 千米
水星平均日距
57,910,000
km
(0.38
au)
水星的小档案:
直径
4,878
km
质量
3.30e23
kg
密度
5.43
gm/cm
重力
0.376
g
公转
87.97
地球天
自转
58.65
地球天
水星是最靠近太阳的行星，由於水星距离太阳实在太近了，表面温度很高，太空船不易接近，在地球上也不容易观测，因为可观测的时间都集中在清晨太阳出来的前几分钟，和夕阳落下后的几分钟，时间不容易掌握，而且，在背景亮度尚高的情况下，要去找一颗比月亮大不了多少的水星，实在不是件轻松的事水星是最靠近太阳的行星，所以它运行的速度比其他行星都快，每秒的速度接近48公里，并且不到88天就公转太阳一周。水星非常小，是由岩石构成的，表面布满被流星撞击而形成的环形山和坑洞，另外有平滑，稀疏的坑洞平原。水星表面另外还有山脊，这是行星在40亿年前核心逐渐冷却与收缩所形成的，因此表面起伏不平。水星自转的速度非常缓慢，自转一周将近59个地球日，所以水星的一个太阳日（从日出到另一个日出）差不多要176个地球日—相当於水星一年88日的两倍长。水星的表面温度很悬殊，
向阳面高达摄氏430度，阴暗面则在摄氏零下170
度。当黑夜降临时，由於水星几乎没有大气层温度下降很快。大气成分包括由太阳风所捕捉到的微量氦和氢，或许还有一点其他的气体。
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