Stars Crossword

2. Scientist who discovered the conservation of mass-energy.
6. The type of force that takes over the electric force in a star to fuse atoms together and form heavier atoms.
7. The process in which small atoms under tremendous temperature form larger atoms.
9. Color emitted by the coolest stars.
10. The mathematical relationship between color and temperature of a star.
12. Radius of a black hole in which nothing can escape it unless you are traveling faster than the speed of light.
15. Color emitted by the hottest stars.
17. Something with a large amount of mass with zero volume and infinite density. Hint: We just got a picture of this for the first time.
18. As a nebula squeezes into an even more tightly compressed cloud, it will eventually form a _______.

1. A ball of neutrons about 25 km in diameter created when a star dies.
3. A cloud of gas and dust in which stars are formed from.
4. Types of classification system in which classes are signified by Roman Numerals.
5. Important graph used to look at patterns of stars using their temperature and luminosity.
8. Law that states that the energy of a star is proportional to temperature raised to the fourth power.
11. Most stars on the HR Diagram are classified as this.
12. Point of the black hole identified as the unknowable center.
13. The process of star formation begins when a shock wave hits a nebula from a nearby _______ explosion.
14. This person led a group of women to classify stars by the strength of their hydrogen lines.
16. Neutron stars are known to emit a beam of light rotating like a light house. This rotating beam of light is also known as a ______.