Across
- 3. life which may occur outside Earth and which did not originate on Earth.
- 5. star- a small piece of rock or dust that hits Earth's atmosphere from space.
- 7. Bodies- any natural body outside of the Earth's atmosphere.
- 9. Belt- a circumstellar disc in the outer Solar System.
- 10. Belt- a belt made out of rocks and ice.
Down
- 1. Tail- consists of gas and dust that can extend hundreds of millions of kilometers away from the coma.
- 2. an icy, small Solar System body.
- 4. a layer or a set of layers of gases surrounding a planet.
- 6. Cloud- a theoretical cloud of predominantly icy planetesimals.
- 8. Orbit- the special case of a circular orbit, with eccentricity equal to 0.