Across
- 2. a graph that shows the relashionship between a stars surface temperature and absolute magnitude
- 4. space and all the matter and energy in it
- 5. all of the frequencies or wavelengths of electromagnetic radiation
- 9. the actual brightness of an object such as a star
- 11. a star that collapsed under gravity to the point where electrons and neutrons have smashed together to form neutrons
- 12. the brightness of a star as seen from earth
Down
- 1. the distance light travels in a year;abut 9.6 trillion kilometers
- 3. a measure of how bright a star would be if it were seen from a standard distance
- 6. a gigantic explosion in which a massive star collapses and throws it's outer layers into space
- 7. a small hot dim star that is left over of an old sun like star
- 8. a collection of star dust and gas bound together by gravity
- 10. a large cloud of gas and dust in interstellar space; a region where stars are born