🪐intro to astronomy review

key term - Voids

Definition

Voids are vast, empty regions in the universe with very few galaxies. They are significant in understanding the large-scale structure of the cosmos.

5 Must Know Facts For Your Next Test

  1. Voids can range from 10 to over 100 million light-years in diameter.
  2. They were first discovered in the late 20th century through galaxy redshift surveys.
  3. Voids account for about 80% of the volume of the known universe.
  4. They are surrounded by walls, filaments, and clusters of galaxies.
  5. The existence of voids supports the theory of cosmic inflation.

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