Earth
EARTH The Earth is a terrestrial planet in the Solar System, and it is the third planet from the Sun. It is the only known planet to support life and has a diameter of approximately 12,742 kilometers (7,918 miles) and a total surface area of about 510.1 million square kilometers (196.9 million square miles). Here are some key facts about the Earth : - The Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and trace amounts of other gases such as carbon dioxide, neon, and helium. - The Earth's surface is covered by approximately 71% water and 29% land. - The Earth's magnetic field helps protect the planet from the solar wind and cosmic radiation. - The Earth has one natural satellite, the Moon, which is the fifth largest moon in the Solar System. - The Earth orbits around the Sun at an average distance of about 149.6 million kilometers (93 million miles). - The Earth rotates on its axis once every 24 hours, which creates day and night. - The Earth has a com...