Explore the Planets

Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life. About 71% of Earth's surface is covered with water, with the remaining 29% consisting of continents and islands.

Key Facts

• •Earth is the only planet not named after a god
• •Earth has a powerful magnetic field created by its nickel-iron core
• •Earth's atmosphere is composed of 78% nitrogen, 21% oxygen, and 1% other gases
• •Earth has one natural satellite - the Moon