Across
- 5. The brightness of a star as seen from earth
- 6. all of the frequencies or wavelengths of electromagnetic radiation
- 7. Space at all the matter and energy and it
- 8. A collection of stars dust and gas found together by gravity
- 9. A measure of how bright star would be if it were seeing from a standard distance
- 12. hey star that it has collapsed under gravity to the point that electrons and protons have smashed together to form a neutron
Down
- 1. Russell diagram a graph that shows the relationship between a stars surface temperature and absolute magnitude
- 2. A gigantic explosion in which a massive star collapses and throws it outer layer to space
- 3. The distance that light travels in a year
- 4. large cloud of dust and gas in interstellar space
- 10. The actual brightness of an object such as a star
- 11. A small hot dim star that is left over center of an old sun like star