1. Nine planets revolve around the Sun. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.

2. Jupiter is the fifth planet in order from the Sun, with an equatorial diameter of 142,796 km.

3. It is about 778.3 million kilometers from the Sun.

4. Venus is the most brilliant planet, which is the second planet in order from the Sun.

5. In ancient times, these were names of gods and goddesses.

6. For example, Jupiter was identified as Greek god Zeus.

7. Venus was identified as Romans goddess of love and beauty

8. Saturn's name was the Roman god of agriculture.

9. We land spacecrafts on Mars, and novelists write a thousand of stories about Martians.

10. However. Scientists don't have the evidence of intelligent life forms on Mars.