行星
水星
Mercury
The planet closest to the Sun
暂无经核实的译文：显示英文
简介
Small and rocky, Mercury has no real atmosphere to hold heat: the sunlit side exceeds 400 °C while the night side drops below −170 °C. Its cratered surface looks much like the Moon's.
你知道吗？
A solar day on Mercury (noon to noon) lasts about 176 Earth days — longer than two of its years.