Space

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Across
  1. 2. As a massive star collapses its sends out a giant shockwave that can create new atomic nuclei
  2. 5. A giant burning ball of hot gas mainly hydrogen
  3. 6. An area with such immense gravity that nothing can escape it not even light
Down
  1. 1. AN area that consists of a star and everything that orbits around it
  2. 3. All existing matter and space in a whole
  3. 4. A huge collection of gas and dust with many stars and solar systems