There are many stars in the sky. The stars are very far away.

The Sun is a star too. It looks much bigger than other stars because it is very close to us.

Some stars are planets which are always moving.

There are nine planets moving around the Sun and are called the Solar System. In order of distance from the Sun are － Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.

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i've read this comprehension .

this is talk about sciene.i 'm interested about it .