Science

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Across
  1. 7. pulsating star that brightens and changes over a period of time
  2. 8. no distinct shape or size
  3. 9. flat disk like shape featuring a bright central buldge
  4. 10. Different measurements in space
Down
  1. 1. up or down
  2. 2. is bigger than a galaxy
  3. 3. almost oval, like a circle
  4. 4. clusters in space
  5. 5. The amount of light travels in a year
  6. 6. smaller than a universe