space crossword

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Across
  1. 4. What is a luminous astronomical object?
  2. 6. What is a pattern of stars called?
  3. 7. what planet is known as the red planet?
  4. 8. What is earths twin?
  5. 10. What is the planet closest to the sun?
Down
  1. 1. How is time measured in space?
  2. 2. How are the planets held together?
  3. 3. What is the last planet?
  4. 5. What is the outside of the sun called?
  5. 6. What is the middle of the sun called?
  6. 9. What planet is known as the gas giant?