Mercury
The smallest planet in the solar system
About Mercury
One solar day on mercury lasts the equivalent of 176 Earth days while the sidereal lasts 59 Earth days. Mercury also has the highest orbital eccentricity of all the planets with its distance from the sun ranging from 46 to 70 million km. One of five planets visible with the naked eye a, Mercury is just 4,879 kilometers across its equator, compared with 12,742 kilometers for the Earth.