Is there proof of billions of galaxies?

Later on, other galaxies in our Local Group — the galaxies closest to us — will eventually combine. Residents of that future galaxy would have a much darker universe to observe, Livio said. "Civilizations started then, they would have no evidence that there was a universe with 100 billion galaxies," he said. read more

Galaxies — those vast collections of stars that populate our universe — are all over the place. Perhaps the most resonant example of this fact is the Hubble eXtreme Deep Field, a collection of photographs from the Hubble Space Telescope revealing thousands of galaxies in a single composite picture. read more

"So a number like 200 billion [galaxies] is probably it for our observable universe." Webb's contributions. While it is interesting to count the number of galaxies in our universe, astronomers are more interested in how galaxies reveal how the universe was formed. read more