Across
- 4. 90% of stars are currently in this stage of their life cycle
- 7. a star that is among the most massive and brightest of all stars.
- 10. the pulling to the middle of the earth, causing things to fall
- 13. a huge system of billions of stars together
- 14. the extremely dense remains of a dead star, very small and desne
- 15. a chart that graphs a star's brightness and temperatuer
- 18. the planet in which we live on
- 20. a ring-shaped nebula formed by an expanding shell of gas around an aging star
Down
- 1. a young star in the early stages of formation; nuclear fussion
- 2. a celestial body that orbits around the sun
- 3. dwarf a dead star that no longer gives off light or heat
- 5. a smooth, circular or oval shaped galaxy
- 6. the name of the spiral shaped galaxy of which we live in
- 8. a random, scattered type of galaxies
- 9. a star that has exhausted all of its nuclear fuel; planet sized and very dense
- 11. an extremely bright explosion of a star
- 12. a flat, disk-shaped galaxy
- 16. the stage after a main sequence for a small to medium mass star; fuel begins to run out.
- 17. a main sequence star that lights up our earth
- 19. a huge cloud of dust and gas in space held together by gravity