Space and its wonders

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Across
  1. 3. when a moon is really close to a planet
  2. 6. space cloud
  3. 7. A concentration of mass so dense that nothing can escape
  4. 8. The diameter of a telescope’s main lens or mirror
  5. 9. collection of stars
  6. 11. big bright ball of gas
  7. 12. the edge of a celestial object’s visible disk.
Down
  1. 1. pattern of stars
  2. 2. dirty snowball
  3. 4. our galaxy
  4. 5. the distance of how far light can travel in a year
  5. 10. a solid body orbiting the sun that is made of rock and metal