Across
- 4. Magnitude the brightness of a star as seen from Earth
- 5. Magnitude a measure of how bright a star would be if it were seen from standard distance
- 9. Spectrum all of the frequencies or wavelength of electromagnetic radiation
- 10. Dwarf a small hot dim star that is the leftover center of an old sun like star
- 12. a large cloud of gas and dust in interstellar space a region where stars are born
Down
- 1. a collection of stars dust and gas bound together by gravity
- 2. Year the distance that light travels in a year about 9.46 trillion kilometers
- 3. space and all the matter and energy in it
- 6. a gigantic explosion in which a massive star collapses and throws its outer layers
- 7. the actual brightness of an object such as a star
- 8. Star a star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons
- 11. Diagram Hertzsprung Russell diagram a graph that shows the relationship between a star surface temperature and absolute magnitude