The side of Mercury which faces the sun is 350 degrees Celsius. The side which is away form the sun is dark and cold. At 170 degrees below zero Celsius, it is probably the coldest place in the solar system.

• 水星面对太阳的一面达350度。背离太阳的一面黑暗而寒冷，达到摄氏零下170度，它可能是太阳系中是最寒冷的地方。