Earth is located in the Milky Way galaxy. The Milky Way is a barred spiral galaxy that is part of the Local Group of galaxies, which also includes the Andromeda Galaxy, the Triangulum Galaxy, and about 54 other smaller galaxies. The Milky Way has an estimated 100-400 billion stars and a diameter of about 100,000 light-years.
1. The Earth is not a perfect sphere but is an oblate spheroid, meaning it is slightly flattened at the poles and bulging at the equator.
2. The Earth's day and night cycle is caused by its rotation on its axis, which takes 24 hours.
3. Earth is the only planet in our solar system with plate tectonics, which cause earthquakes and volcanic eruptions.
4. The highest point on Earth is Mount Everest, which stands at 29,032 feet (8,848 meters) above sea level.
5. The Earth has a "twin" planet named Venus, which is similar in size, mass, and composition.
6. The Great Barrier Reef, located off the coast of Australia, is the largest coral reef system in the world, stretching over 1,400 miles (2,300 km).
7. The Earth's oceans contain 97% of the planet's water, with the remaining 3% found in lakes, rivers, and groundwater.
8. The Earth is constantly bombarded by tiny meteoroids and space debris, which burn up in the atmosphere and create shooting stars.
9. The Earth's magnetic field helps to protect life from harmful solar and cosmic radiation, and also affects the direction of compass needles.
10. The Earth's atmosphere is divided into several layers, including the troposphere (where weather occurs), stratosphere (where ozone is found), and mesosphere (where meteors burn up).
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