The Expanding Universe

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Across
  1. 2. The part of the spectrum with shorter wavelengths and higher frequencies.
  2. 3. Dark lines in a spectrum caused by absorption of light by atoms.
  3. 6. The scientist who discovered that distant galaxies are moving away from Earth.
  4. 7. The increase in distance between galaxies over time.
  5. 8. The stretching of light waves caused by a galaxy moving away from the observer.
  6. 10. A galaxy that is predicted to collide with the Milky Way in the future.
  7. 12. A huge collection of stars held together by gravity
  8. 14. The speed at which a galaxy moves away from Earth.
Down
  1. 1. The shift of light to longer wavelengths when a galaxy is moving away from Earth.
  2. 4. The faster a galaxy moves away, the _____ the red-shift.
  3. 5. The idea that humans do not occupy a special position in the universe
  4. 9. The part of the light spectrum with longer wavelengths and lower frequencies.
  5. 11. The shift of light to shorter wavelengths when an object is moving towards Earth.
  6. 13. Everything that exists, including all galaxies and space itself.