Across
- 4. what stars like the Sun become after they have exhausted their nuclear fuel.
- 5. a function takes an infinite value in space-time when matter is infinitely dense at the center of a black hole.
- 8. The spectrum that is divided into separate bands, with different names for the electromagnetic waves from low to high frequency like radio waves, microwaves, ect.
- 10. A group of stars seen as forming a figure or design in the sky
- 11. every object in the universe attracts every other object in the universe.
- 12. a system of stars, gas, dust, and dark matter bound together by gravity.
Down
- 1. the change in the frequency of a light wave depending on whether an object is moving toward or away from us.
- 2. theory that describes how the universe expanded from an initial state of high density and temperature
- 3. when hydrogen and helium mix it creates what
- 6. a unit of measurement equal to the distance from the center of the earth to the center of the sun.
- 7. an instrument that makes distant objects appear closer
- 9. the study of everything in the universe beyond Earth's atmosphere.