EARTH
Earth is the third planet from the sun. It's the only planet known to have an atmosphere containing free oxygen, oceans of water on its surface and, of course, life. Earth is the fifth largest of the planet in the solar system . About a fifth Earh atmosphere consists of oxygen, produced by plants.
Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains. Earth is special because it is an ocean planet. Water covers 70% of Earth surface Earth has it own moon.
Earth Facts
- Diameter: 12,742 km
- Mass: 5,972 x 10^24 kg
- Orbit Distance: 149.60 million
- Orbit period: 365 days
- Surface Temparature: 1.7° 54.4°
- First Record: 5th Century
- Recorded By: Sir Fred Hoyle