Science Week 4 Crossword

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Across
  1. 2. The type of light that carries more energy than visible light
  2. 4. The distance that light can travel in one year.
  3. 7. Scientists who study space
Down
  1. 1. A group of stars that form a pattern
  2. 3. Includes planets, moons, asteroids, and comets.
  3. 5. The process that combines atoms and releases energy.
  4. 6. A large group of stars, planets, gas, and dust stuck together by gravity.