Galaxies

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Across
  1. 2. The universe’s way of stretching out like a balloon with no end,
  2. 5. A cosmic city filled with billions of stars, swirling in the great unknown,
  3. 6. If it takes up space and isn’t a ghost, it’s this,
  4. 7. So huge it makes you feel tiny—just like staring at the night sky,
  5. 8. When something changes big time, like a caterpillar into a butterfly—or a star into a black hole,
Down
  1. 1. A super-speedy space ruler measuring how far light zooms in a year,
  2. 3. The never-ending cosmic racetrack planets follow around a star,
  3. 4. The puffy middle of some galaxies, like a cosmic belly,
  4. 5. The invisible glue that keeps planets from drifting off into space,
  5. 9. The far-flung edges of a place—whether it’s a city or a swirling galaxy.