The Universe

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Across
  1. 4. everything that exists in space
  2. 6. the distance light travels in one year
  3. 7. a powerful and luminous explosion of a star
  4. 9. the force that pulls objects towards each other
  5. 12. place in space where the gravity is so strong that not even light can escape
  6. 13. a group of stars that form a pattern
  7. 14. a regular and repeating circuit that one celestial object takes around another
  8. 15. a cloud of dust and gas in space
Down
  1. 1. main theory explaining how the universe started
  2. 2. an object intentionally placed into space to orbit a celestial body to collect information
  3. 3. a huge collection of gas, dust and billions of stars and their solar systems held together by gravity
  4. 5. the star that objects in our solar system orbit
  5. 8. the planet that we live on
  6. 10. a celestial object that orbits its sun
  7. 11. when one celestial body blocks light from reaching another by moving between it and its light source