Across
- 2. Hotter stars look bluish ___________.
- 6. Earth's closest star.
- 8. Another name given to astronomers.
- 10. An instrument used by astronomers to look at stars.
- 11. A place with a circular room in which people can find out about stars, constellations and planets.
- 12. Earth belongs to this galaxy.
Down
- 1. The distance light travels in a year.
- 3. Some stars seem to ___________, which is an effect caused by Earth's atmosphere.
- 4. A thick layer of air surrounding Earth.
- 5. A group of bright stars.
- 7. This is made up of many billions of stars.
- 9. Cooler stars look ___________.
- 13. Warmer stars look ___________.