Unit 1 Space

3. This describes inner planets made of rock
5. It has a clear orbit
11. The name of our solar system
13. A meteor that has hit the Earth's surface
14. It is smaller than an asteroid and could be a part of an old planet, comet or asteroid
15. It is round, orbits the sun, but does not have a clear orbit
17. They usually have many moons, are larger and are outer planets

1. A meteoroid that has entered Earth's atmosphere
2. This planet rotates on its side
4. A group of planets orbiting a star
6. The number of planets in our solar system that don't have moons
7. The name of the space probe used to explore objects far away in our solar system
8. It is found far away from the Sun, has a tail and an icy core
9. It is made of all the galaxies and everything else
10. The area where Ceres is found
11. It orbits a planet
12. Most of the dwarf planets are found here
16. The force that attracts things and holds things together
18. A group of solar systems held together by gravity