Across
- 3. a well-tested explanation of scientific observations and experiments
- 6. A cluster of stars twisted around like a spiral. Example: Milky Way Galaxy
- 8. a galaxy that has a generally elliptical shape and that has no internal structure or spiral arms
- 10. a group of planets and other bodies that revolve around a star
- 11. a fundamental unit that is not combined with other units
- 12. A set or cluster of stars & dust held by gravity
Down
- 1. An object dense enough to trap anything in its gravitational fields at a distance
- 2. The distance between the Sun and the Earth
- 3. a gigantic explosion of a large star
- 4. information that supports or refutes a theory
- 5. the galaxy we live that contains the stars
- 7. a unit equals equal the distance that light travels in space in one year
- 9. a large cloud of gas and dust in space