Life Cycle Of Stars

3. How much light reaches earth from a star
7. what occurs before black holes
9. The exact light a star gives off
11. The distant light can travel in a year
12. Is so dense that one teaspoon would weigh more than 600 million metric tons on earth
13. A huge group of single stars,star systems,star clusters,dust and gas based together by gravity

1. An enourmous explosion that has the universe still expanding
2. an instrument scientist use to speed into different wavelengths
4. a region of spacetime where gravity is so strong that nothing such as light—can escape from it.
5. the range of wave length that stars emit
6. after billions of years this star will cool down
8. Active young galaxies with black holes in the center
10. The beginning of the life cycle of stars