Stellar Evolution

5. A _______ star has two stars that revolve around each other.
6. ________ ________ stars are massive and have high surface temperatures
8. This consists of stars, planets and clouds of gas and dust that are all bonded together by gravity.
13. _______ _______ stars that fuse hydrogen into helium to produce energy and are the most common stars in the universe.
14. ________ _______ is a region of cosmic dust and gas formed from a cast-off of outer layers of a dying star.
15. This is a mineral that can no longer be fused in the core of stars and signifies a stars death.
16. _________ _______ is a type of star that is dense and near the end of its nuclear burning stage so only a hot core of the star remains.
17. ________ ________ stars are stars that are nearing the end of its life and have expanded and changed color.

1. How stars evolve over time.
2. The name of our galaxy.
3. This is a type of star that is a subclass of AGNs that are extremely luminous and have a supermassive black hole in the center.
4. A cloud of gas a dust that forms new stars.
5. A region of spacetime where gravity is so strong that nothing, not even light can escape.
7. ________ _________ stars are massive stars that have run out of hydrogen to fuel its core and are the largest stars in the universe in terms of volume.
9. A massive explosion that occurs when a star dies.
10. A type of neutron star that emits regular pulses of radiation.
11. A type of star that are created when massive stars reach the ends of their lives and are composed of the densest matter in the known universe.
12. ________ ______ are a flow of gas ejected from the upper atmosphere of a star.