Across
- 2. An explosion stage which can happen several times in a star's life
- 5. Type of star created from a dense ball of neutrons
- 9. Fixed patterns in the night sky
- 11. Neutron star with two beams of radiation
- 13. Type of constellation that is visible all year
- 15. The first stage of every star's life
- 16. The stage of a star's life before supernova
- 17. A galaxy with no defined shape
- 20. Expanding gasses surrounding an extremely hot core of a star
- 22. What exists in the center of a nebula just before a main-sequence star forms
- 23. The stage of a star's life before planetary nebula
- 25. The galaxy that we are in
Down
- 1. A cluster of stars usually found in the center of a galaxy
- 3. Star system with more than two stars that orbit each other
- 4. Makes up the difference between a giant and a supergiant
- 6. Type of galaxy with spiraling arms and a band of stars that runs through the center
- 7. A dead star in space whose gravity is so great, not even light can escape
- 8. A round of disk shaped galaxy
- 10. The kind of galaxy the Milky Way is
- 12. A cluster of stars usually found in the arms of a galaxy
- 14. This causes a nebula to contract
- 15. Type of reaction that occurs in the core of all main-sequence stars
- 18. Collection of gas, dust, nebulae, and stars
- 19. The force that causes pressure inside of stars
- 21. The stage of a star's life cycle that likely doesn't exist
- 24. Star system with exactly two stars that orbit each other