Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...

The closest are the four rocky planets, the remaining gas planets inhabit deeper space. The solar system is also home to many other cosmic bodies including asteroids, moons and dwarf planets such ...

The relative size of the inner planets of our solar system: Mercury, Venus, Earth and Mars. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!