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Earth

10:11

Flat Earth vs. Round Earth | Explorer

3:33

Earth 101 | National Geographic

2:22

The Planet Earth - The Solar System 3D animation for kids

1:54

What if the Moon Crashed into the Earth?

2:25

Planet Earth Song

Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite. Earth revolves around the Sun in 365.26 days, a period known as an Earth year. During this time, Earth rotates about its axis about 366.26 times.
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  • Fun facts 

  • Name and etymology 

  • Chronology 

  • Physical characteristics 

  • Orbit and rotation 

  • Habitability 

  • Human geography 

  • Moon 

  • Asteroids and artificial satellites 

  • Cultural and historical viewpoint