Facts about the planet earth

Planet Earth Facts

Planet Earth


1. The Earth is around 4.6 billion years old.

2. The Earth is the densest planet in the Solar System.

3. The Earth's atmosphere is composed mainly of nitrogen (77%), oxygen (21%), argon (.93%), and carbon dioxide (0.03%).

4. Earth is the fifth largest planet in the Solar System.

5. The Diameter of the Earth is 12,756 km

6. The earths orbital speed is 29.8 km per second.

7. The Earth has only one satellite, the Moon. The Moon is the second brightest object in the sky.

8. Earth has an average surface temperature of 13 degrees C (55.4 degrees F). The planet would be much colder without greenhouse gasses, such as carbon dioxide and water vapor, to trap outgoing thermal radiation. The greenhouse effect raises the planet's temperature 35 degrees C (95 degrees F).