Which Planet is Closest to the Sun
However because Proxima Centauri is a smaller and cooler red dwarf type star the planets orbit is within the habitable zone. Its a little bigger than Earths Moon. The 4 Inner Planets Are The Closest To The Sun And The Outer Planets Are The Other Four Jupiter Saturn Uranus And Nept Outer Planets Planets Solar System For example Venus is about 033 AU farther from the Sun than Mercury while Saturn is about 43 AU farther from Jupiter and Neptunes orbit is 105 AU. . It has a solid surface that is covered with craters like our Moon. Mercury is the closest planet to the sun and has a thin atmosphere no air pressure and an extremely high temperature. An inferior planet a planet whose orbit is interior to Earths orbit is farthest from Earth near the time of superior conjunction and closest to Earth near the time of inferior conjunction. In fact the simulation showed that all seven planets spend most of their time closer to Mercury