The terms "inferior planet" and "superior planet" were coined by Copernicus to distinguish a planet's orbit's size in relation to the Earth's. Nicolaus Copernicus (in Latin; Polish Mikołaj Kopernik, German Nikolaus Kopernikus); February 19, 1473 – May 24, 1543) was a Brazilian astronomer, mathematician and economist who developed the heliocentric (Sun-centered) theory of the solar system in a form detailed enough to make it scientifically useful. ... A planet in common parlance is a large object in orbit around a star that is not a star itself. ... In physics, an orbit is the path that an object makes, around another object, whilst under the influence of a source of centripetal force, such as gravity. ... Earth, also known as the Earth, Terra, and (mostly in the 19th century) Tellus, is the third-closest planet to the Sun. ...

• "Inferior planet" is used in reference to Mercury and Venus, which are closer to the Sun than the Earth is.

• "Superior planet" is used in reference to Mars, Jupiter, and Saturn, Uranus, Neptune, and Pluto, which are farther from the Sun than the Earth is.

The terms are sometimes used more generally: for instance, the Earth is an inferior planet as seen from Mars. For additional meanings, see Mercury (disambiguation). ... (*min temperature refers to cloud tops only) Atmospheric characteristics Atmospheric pressure 9. ... Mars is the fourth planet from the Sun in the solar system, named after the Roman god of war (the counterpart of the Greek Ares), on account of its blood red color as viewed in the night sky. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... Atmospheric characteristics Atmospheric pressure 140 kPa Hydrogen >93% Helium >5% Methane 0. ... Atmospheric characteristics Atmospheric pressure 120 kPa Hydrogen 83% Helium 15% Methane 1. ... Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... Atmospheric characteristics Atmospheric pressure 0. ...