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