Unit 4 Other Stars

4. the core of a high-mass star that is left after a supernova that cools down over time
7. the violent end to a high-mass star that has burned through all of its available fuel source
8. created when a mass is sufficiently high enough that the velocity needed to escape its gravity is greater than the speed of light
10. the theoretical end stellar phase of a white dwarf after it cools down for quadrillions of years and crystallizes
12. stellar phase that medium-mass stars experience after their layers of gas are blown away and the hot remnant core remains

1. stellar phase that high-mass stars experience after they leave the main-sequence
2. failed stars that are halfway between a planet and star in mass
3. stellar phase that medium-mass stars experience once a stellar wind develops in their envelope
5. the heaviest element that can be fused in the core of a star
6. process to generate energy used by stars where three helium atoms fuse to make one carbon atom
9. process to generate energy used by stars more massive than the Sun that fuses Carbon-12 with protons until a Helium nuclei is produced
11. stellar phase that stars between 0.8 solar masses and 2 solar masses experience after they leave the main-sequence