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Across
  1. 2. / A cluster of stars (eg Milky Way)
  2. 8. / The explosion of a star at the end of its life
  3. 9. / The hottest planet in our Solar System
  4. 11. / This is what stars convert hydrogen into through fusion
  5. 12. / A cloud of dust that is left at the end of the life of a star
Down
  1. 1. / This is what all stars initially have in them
  2. 3. / "The age of our Sun is roughly four ......... years"
  3. 4. / These are made of ice, dust and rocks
  4. 5. / This causes the earth to orbit the Sun
  5. 6. / The Earth’s only satellite, Saturn has 62
  6. 7. / The largest planet in our Solar System
  7. 10. / The process by which nuclei "join" together