Space

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Across
  1. 3. a system made up of millions or billions of stars
  2. 4. a group of stars which are gravitationally bound
  3. 6. a spherical chunk of rock or gas
  4. 8. a set of stars
  5. 9. a cloud of gas and dust that is either an indistinct bright patch or a dark silhouette against other luminous matter
Down
  1. 1. an object used to see far-away objects
  2. 2. a galaxy that has an irregular shape
  3. 5. a big explosion resembling the death of an old star
  4. 7. a big ball of hot gas and dust that was generated from a dust cloud
  5. 10. hole an intense gravitational field that now matter or radiation can escape