Across
- 1. Made up of planets
- 4. Classifies stars by luminosity and temperature
- 7. Everything is in this
- 8. Shaped like a disc
- 11. How bright something is
- 12. Star that does not emit light or heat
Down
- 2. the group in which a star is classified according to its spectrum
- 3. formed by gas and dust
- 5. A group of stars that are very bright but low in temperature
- 6. The sun is classified as this
- 9. We are in this galaxy
- 10. Very hot but very dim star