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