Mars: The Red Planet Distance from the Sun: ~228 million km (142 million miles) Orbital Period: 687 Earth days Type: Terrestrial Mars is often the focus of exploration due to its potential to have once supported life. Its surface is red due to iron oxide, or rust, which dominates its

Pluto was reclassified from a planet to a **dwarf planet** in 2006 due to a new definition of what constitutes a planet, as set by the **International Astronomical Union (IAU)**. Before that, Pluto was considered the ninth planet in the solar system since its discovery in 1930. However, advances in

Pluto Hasn't Cleared Its Orbit Pluto orbits within the Kuiper Belt, a region beyond Neptune filled with many icy bodies and debris. Unlike the eight recognized planets, Pluto shares its orbit with other objects of similar size, including other dwarf planets and small celestial bodies. Therefo