Across
- 2. Space and all the matter and energy in it
- 4. A measure of how bright a star would be if it were seen from a standard disntance
- 6. A star that has collapsed under gravity
- 10. All of the frequencies or wavelengths of electromagnetic radiation
- 12. The distance that light travels in a year; about 9.46 trillion kilometers
Down
- 1. Hertzsprung-Rusell diagram a graph that shows the relationship between A stars surface, temputure
- 3. The actual brightness of a star as seem from earth
- 5. A gigantic exostion in wich a massive star collapse and throws its outer layer into space
- 7. A small hot dim
- 8. A large cloud of gas and dust in insterastellar space; a region where stars are born
- 9. The actual brightness of an object such as star
- 11. A collection of stars, dust and gas bound together by gravity