Earth

• Earth is the third planet from the Sun and the only known planet to support life.
• About 71% of Earth's surface is covered by water, with the remaining 29% consisting of continents and islands.
• Earth's atmosphere is composed of 78% nitrogen, 21% oxygen, and trace amounts of other gases.
• Earth has one natural satellite, the Moon, which influences tides and stabilizes the planet's rotation.
• Earth's magnetic field protects the planet from harmful solar radiation and cosmic rays.