astronomy

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Across
  1. 1. Make less hot.
  2. 4. outside, external
  3. 5. send out something such as light, heat and sound.
  4. 8. Anything that has mass and occupies a space.
  5. 10. this refers to everything that exists.
  6. 12. a particle of matter that defines a chemical element (hydrogen and helium)
  7. 13. a galaxy inside a group of galaxies.
  8. 14. large clouds of gas made up of hydrogen, helium and interstellar dust.
  9. 15. large spheres of gas, mostly hydrogen and helium)
  10. 16. Most scientists believe the Universe formed during this event.
Down
  1. 1. A group of stars in patterns and shapes.
  2. 2. An object that is round like a ball.
  3. 3. Nos spread out, many things existing in a small space.
  4. 6. between stars
  5. 7. large groups of stars.
  6. 9. In the shape of a spiral, like a snail's shell.
  7. 11. a circle of light around or above something.