Across
- 1. A pretend version of something that scientists use when the real thing is too big, or too small, or too complicated to work with.
- 5. All the planets and other objects that orbit around a star.
- 7. A large round object in outer space that orbits a star.
- 9. A group of stars in the night sky that form a pattern
- 10. To spin around a central point like the Earth around it's axis.
Down
- 2. Circling around another object llke the Earth around the sun.
- 3. The amount of space between 2 things
- 4. something that happens again and again in a way that can be predicted.
- 6. A set of events that repeats in the same order over and over again.
- 8. An imaginary line that goes through the middle of the Earth.