Across
- 2. the distance from the Earth to the Sun, about 93,000,000 miles (_________ unit)
- 5. the stretching of a wavelength of radiation emitted by a celestial body that is moving away from an observer as a consequence of the Doppler effect
- 8. the apparent displacement of an observed object due to a change in the position of the observer. *used to find the distance to nearby stars. (Two words)
- 9. areas of interstellar matter that has a higher density; also known as interstellar clouds.
- 11. The compression of a wavelength of radiation emitted by an approaching celestial body as a consequence of the Doppler effect
- 14. makes up 70% of the universe, believed to propel the universe to expand, counteracting gravity (two words)
- 15. Whose Constant is "Ho" or "H-naught", represents the average expansion of the universe in Hubble's Law
- 16. refers to the dramatic growth in the size of the early universe
- 17. elements the remaining elements such as, carbon, nickel, and iron, when a black hole loses all energy and force.
- 19. makes up 5% of the universe, is everything that we can see (two words)
- 21. the process of splitting an atoms nucleus into seperate and sometimes several parts
- 22. A branch of astronomy, that studies the universe, how it began, how it evolves, and what it is made of
Down
- 1. Hydrogen and Helium, the amount of these gases in the universe is evidence that the Big Bang did occur (__________ Elements)
- 3. the distance that light travels in a year (it IS NOT a measurement of time) (two words)
- 4. An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other. (_____ Effect)
- 6. makes up 25% of the universe, cannot be seen, but has very strong gravitational effects (two words)
- 7. redshift a redshift in the spectra of a galaxy's light because of the expansion of space itself
- 10. A Theory that says the universe began as a tiny, hot, and dense collection of matter and radiation that expanded about 13.7 billion years ago (two words)
- 12. spots on the Sun that are darker than the rest of the Sun because the temperature in that area is cooler
- 13. process where hydrogen nuclei fuse together to produce heluim
- 18. What theory says that though the universe is expanding, it is also infinitely old and that the formation of the universe is an ongoing process?
- 20. Microwave Background Radiation radiation produced about 400,000 years after the Big Bang occurred that is still streaming across the universe