how high does the temp get in mercury
The reason for this is that Mercury has a thin atmosphere that cannot trap solar heat. Its maximum atmospheric pressure is estimated to be 0.00000000003 pounds per square inch; on Earth, the atmospheric pressure is around 14.7 pounds per square inch.Mercuryâs atmosphere is composed of very small amounts of hydrogen, oxygen, helium and sodium.The planet still get hot on the side that faces the Sun, it experiences the most extreme temperatures, which can reach as high as 700Â° Kelvin (427Â°C).ts maximum atmospheric pressure is estimated to be 0.00000000003 pounds per square inch; on Earth, the atmospheric pressure is around 14.7 pounds per square inch. Mercuryâs atmosphere is composed of very small amounts of hydrogen, oxygen, helium and sodium.