The Universe

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Across
  1. 2. A giant cloud of gas and dust
  2. 3. Star further away look red compared to closer. Shows that the universe is still expanding.
  3. 6. The star shrinks into the center. Grows 10x bigger
  4. 7. Shaped with long arms. Flat rotating disk of stars, gas, and dust
  5. 8. Distinct shape might have been a spiral or elliptical once.
  6. 9. Density... With inmensity, small. A pulser.
  7. 13. Bubble of heat and density smaller than an atom. Bubble exploded and the universe filled with clouds of hydrogen and helium
  8. 14. Forms from supernovas. Gravity is so powerful nothing can escape
  9. 15. Star collapse and then explodes
Down
  1. 1. Starts big and gets bigger as the star shrinks into the middle
  2. 3. Element-rich leftovers of an exploded star gets re-used in the universe.
  3. 4. Leftover core after the planetary nebula. No more nuclear fusion.
  4. 5. Part of nebula clump together through gravity.
  5. 10. Spherical. very long and oblong, smooth and bright. Stars are very old and often red.
  6. 11. Core shrinks as outer layer of gas "puffs away"
  7. 12. Longest stage at the sun