universe

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Across
  1. 4. Objects in space that produce their own light.
  2. 6. The event that started the universe a long time ago
  3. 8. A huge group of stars, planets, and gas.
  4. 10. The bright star at the center of our solar system.
Down
  1. 1. The galaxy where our solar system is located.
  2. 2. Objects in space with gravity so strong that not even light can escape.
  3. 3. Invisible matter in space that has gravity.
  4. 5. The bright star at the center of our solar system.
  5. 7. The force that pulls objects toward each other.
  6. 9. Everything that exists: stars, planets, and galaxies.