The universe contains over 100 billion galaxies. A galaxy is a group of billions of stars. Our own galaxy is called the Milky Way, and it contains about 100 billion stars, including our Sun. The Sun is at the centre of the solar system.
The solar system contains different types of objects including:
* a star - the Sun
* planets, which go around the Sun
* satellites, which go around planets
* smaller objects such as asteroids and comets
All the planets revolve around the Sun. Sun is at the center of solar system.
Mercury to Pluto
Although scientists have discovered some extra objects orbiting the Sun that may be planets, normally we assume that there are nine planets in the solar system. In order, working away from the Sun, these are:
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
If you can't remember the correct order, try this sentence, or make one up of your own:
My Very Easy Method Just Speeds Up Naming Planets
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| Author: Shyni 31 May 2008 | Member Level: Gold Points : 2 |
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