Across
- 3. The pulling force between masses that holds stars together
- 4. A phase less massive stars enter after they have no more fuel to burn and begin to lose mass
- 10. The longest phase of a star's lifecycle, where it begins burning hydrogen
- 13. A phase stars enter after their main sequence, where their outer layers gradually expand
- 14. The pushing force within a star that increases with temperature and density
- 15. A rotating neutron star that regularly emits energy
Down
- 1. The first stage of a star's lifecycle, where it gathers mass from a nebula
- 2. A distant starlike object that emits massive amounts of energy
- 5. The chemical reaction that takes place in a star, where elements like hydrogen combine into bigger elements, releasing energy
- 6. A mass so dense that its gravity won't allow light to escape, sometimes left behind after a supernova
- 7. A group of stars, e.g., the Milky Way
- 8. An incredibly dense mass left behind after a supernova
- 9. A cloud of gases that is the birthplace of a star
- 11. An explosion of a red dwarf star, where a sudden drop in pressure causes the star to collapse on itself
- 12. A mass greater than a planet but less than a star