Across
- 2. A gigantic explosion
- 3. a collection of stars dust and gas bound together by gravity
- 4. a small hot dim star
- 6. the actual brightness of an object
- 7. magnitude the brightness of a star seen from earth
- 9. star five star that has collapsed under gravity
- 10. a measure of how brightest star would be if it were seen from a standard distance
- 12. a graph that shows the relationship between the stars surface temperature and absolute magnitude
Down
- 1. of all the frequencies or wavelengths of electromagnetic radiation
- 5. a large cloud of gas and dust and in space
- 8. the distance that light travels in one year
- 11. Space and all the matter and energy in it