astronomy

2. star, a very small star only 12 miles across that spins 44, 000 times a second and is the heaviest type of star in the universe
5. dwarf, an average size star like our sun is called a
8. the study of everything outside of the earth's atmosphere
12. A massive explosion at the end of a star’s life.
13. a star forming region with huge amounts of gas and dust

1. horizon, A boundary around a black hole from which nothing can escape the point of no return.
3. cloud, the name of the cloud of material surrounding the solar system
4. a point in space with strong gravity, where not even light can escape.
6. a star’s core falls inward due to gravity.
7. the most abundant element in the universe
9. giant, a stage in a stars life where it expands turns red and the surface temperature cools down
10. Blue stars, very large and extremely hot stars that live only 75 million years
11. - inside the core of stars atoms are being smashed together and creating energy. this is called nuclear