Across
- 4. point in which matter is infinitely dense, as in the center of a black hole or the universe at the very beginning.
- 6. by equal but opposite charges that are separated by a short distance
- 7. Space Telescope/a space telescope and camera named for a famous astronaut (Edward Hubble) used to study space elements
- 8. huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity
- 9. of the universe
- 11. Fireball/Extremely high frequency radiation that filled space immediately following the Big Bang
- 12. Forces/4 forces that act throughout the universe. They include gravity, electromagnetic force, strong nuclear force and weak nuclear force
- 14. Era/time period greater than 500,000 years since the Big Bang where larger masses, such as stars, formed
- 15. slightly unstable star that has a regular variation in brightness and luminosity due to a periodic expansion and contraction in its outer layers.
- 16. of light to a longer wavelength as it moves away
- 17. point in which matter is infinitely dense, as in the center of a black hole or the universe at the very beginning.
- 18. (shape)/A position or moment of stillness
- 21. measure of how hot or cold something is.
- 22. Shift/the shift to a different wavelength
- 23. Matter/matter that does not give off electromagnetic radiation but is quite abundant in the universe
- 25. unit for temperature
- 27. for measuring intensity of light
- 28. Lines/The wavelengths where a specific element can absorb or emit light
- 29. Fusion/a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy.
Down
- 1. Hole/An object in space whose gravity is so strong not even light can escape.
- 2. of exponential expansion of space in the early universe.
- 3. interaction between electricity and magnetism
- 5. study of energy transformations that occur in a collection of matter.
- 10. Doppler shift in which spectral features are shifted to shorter wavelengths, observed when an object is moving toward the observer.
- 13. Bang Theory/The theory that the universe originated in a huge explosion that released all matter and energy.
- 15. Density/The theoretical density of the universe that would create a flat universe.
- 19. consisting of antiparticles of normal substances
- 20. apparent shift in the position of an object when viewed from different locations
- 24. volumes of space between superclusters that appear to contain very little matter
- 26. Background Radiation/The electromagnetic radiation left over from the big bang
- 30. distance light travels in one year