Across
- 3. a measure of how bright a star would be from a standard distance
- 6. the brightness of a star seen from earth
- 7. a star that collapsed under gravity which makes a neutron
- 9. the actual brightness of an object
- 11. explosion when a star collapses
Down
- 1. a graph that shows a relationship between a star's surface temperature and absolute magnitude
- 2. a big cloud of gas and dust in interstellar space
- 4. wavelengths of electromagnetic radiation
- 5. space and all the matter and energy in it
- 8. a hot dim star that is a leftover center of a sun like star
- 9. the distance light travels in a year
- 10. lots of stars, dust, and gas bounded together by gravity