Galaxy

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Across
  1. 2. the wavelength of the light is stretched, so the light is seen as shifted towards the red part of the spectrum.
  2. 4. one of the many galaxies across the universe that planet Earth is on.
  3. 6. a small very dense star that is typically the size of a planet.
  4. 8. how astronomers explain the way the universe began.
Down
  1. 1. a giant cloud of dust and gas in space.
  2. 3. the colossal explosion of a star.
  3. 5. the distance light travels in one year.
  4. 7. all things that exist in space.
  5. 9. a large group of stars and planets.