Across
- 2. Hertzsprung-Russel diagram a graph that shows a relationship between the star's surface temperature and the absolute magnitude
- 3. the actual brightness of a object suck as a star
- 5. a collection of stars, dust, and gas bound together by gravity
- 8. a measure of how a star would be if it was seen from a standard distance
- 9. all of the frequencies or wavelengths of electromagnetic radiation
- 12. space and all the matter and energy in it
Down
- 1. the brightness of a star seen by earth
- 4. a small hot dim star that is left over center of a sun like star
- 6. a star that has collapsed under gravity to the point that the electrons and protons smashed together to make neutrons
- 7. a gigantic explosion in which a massive star collapses and throws its outer layer into space
- 10. the distant that light travels in a year
- 11. a large cloud of gas and dust in interstellar space