Across
- 4. After supernova electrons and protons are pushed together and turn into neutrons.
- 6. Remaining mass that collapses and located in small dim part of space.
- 8. Big, cool, and bright stars that run out of hydrogen and fuse together different elements.
- 9. A sequence of stars with hot, dim, bright and cool stars that release a lot of energy.
- 10. How stars are formed and born as cloud of gas.
- 12. A massive explosion of a star bigger than the sun that can fuse elements to iron.
Down
- 1. How bright a star appears on earth
- 2. Graph that represent different groups of stars called spectral class.
- 3. How bright a star actually is
- 5. Disappears over time when stars expand.
- 7. Small, hot, and dim stars that cool over time when they no longer fuse.
- 11. Red giants, Main sequence, and white dwarfs