nuffield: space

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Across
  1. 1. Name of the first artificial satellite in space.
  2. 6. Observatory equipment
  3. 7. Planet's path
  4. 9. Colour of a sunset on Mars
  5. 10. Collection of stars
  6. 11. Largest of the planets
  7. 12. ____ Gagarin: First person in space
Down
  1. 2. Mars or Neptune for example
  2. 3. Exploding star
  3. 4. Halley's _____
  4. 5. Furthest planet from the sun
  5. 8. Attractive force