Nebula Crossword Puzzle

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Across
  1. 4. another name for nebulae
  2. 6. glows faintly from producing their own light or reflecting off stars
Down
  1. 1. reflect light off other stars
  2. 2. absorbs light and appears as a black patch
  3. 3. glow its own light
  4. 5. a large cloud of dust containing stars