Our Solar System: Mercury

Mercury is first planet from the Sun. Mercury is 57,910,000 kilometers from the Sun. It orbits the Sun once every 88 days. It is the smallest of the four inner planets with a diameter of 4879 km at its equator. Mercury does not have any moons. The planet consists of approximately 70% metallic and 30% silicate material. Mercury’s atmospheric composition is made up of 42% Helium, 42% Sodium, 15% Oxygen, and 1% other. The maximum surface temperature has been recorded at 427°C