Across
- 5. galaxy that contanins mostly old stars
- 6. ball of gas
- 8. everything. It includes all of space, and all the matter and energy that space contains
- 9. how astronomers explain the way the universe begansupernova
- 10. the galaxy we are in
Down
- 1. the baby galaxy it has no shape
- 2. stars like the Sun become after they have exhausted their nuclear fuel
- 3. the distance light travels in one yearredshift
- 4. a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms.starcluster
- 7. a giant cloud of dust and gas in spacecosmos