Earth

• Global Rank - The third planet from the Sun.
• Life - The only known planet to support life.
• Surface Composition - About 71% of Earth's surface is covered by water, with the remaining 29% consisting of continents and islands.
• Atmosphere - Composed of 78% nitrogen, 21% oxygen, and trace amounts of other gases.
• Natural Satellite - Earth has one natural satellite, the Moon, which influences tides and stabilizes the planet's rotation.
• Magnetic Field - Protects the planet from harmful solar radiation and cosmic rays.