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C. Complete these facts about space with an appropriate word. Use the vocabulary words above,
1. The sun is at the center of our solar system Earth is one planet in a group of eight planets , scientists now consider pluto to be a dwarf planet.
2. The sun is a star Because it is very close to Earth , it books bigger than the other stars
3. Sometimes a meteor crashes into the moon and makes a crater or giant hole in the surface
4. In the future , scientists want to build hotels on the moon so people can go there on vacation
