More stars in the Milky Way or galaxies in the universe?

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SUMMARY

Estimates indicate that there are approximately 150 billion galaxies in the observable universe, as derived from the Hubble Ultra Deep Field (HUDF) observations. In contrast, the Milky Way galaxy is believed to contain between 200 to 400 billion stars. The discussion concludes that while the numbers are close, the evidence strongly suggests that there are more galaxies in the observable universe than stars in the Milky Way. Future advancements in telescope technology are expected to reveal even more galaxies, reinforcing this conclusion.

PREREQUISITES
  • Understanding of astronomical terminology, including "observable universe" and "Hubble Ultra Deep Field (HUDF)"
  • Basic knowledge of galaxy and star counts
  • Familiarity with telescope technology and its advancements
  • Awareness of light observation and its implications in astronomy
NEXT STEPS
  • Research the Hubble Ultra Deep Field (HUDF) and its significance in galaxy counting
  • Explore advancements in telescope technology, such as the James Webb Space Telescope
  • Investigate the methods used to estimate star counts in galaxies
  • Learn about the implications of light observation from distant galaxies
USEFUL FOR

Astronomers, astrophysics students, and anyone interested in the comparative study of galaxies and stars in the universe.

Are there more stars in the Milky Way or galaxies in the universe?

  • More stars in the Milky Way

    Votes: 0 0.0%
  • More galaxies in the observable universe

    Votes: 7 70.0%
  • Too close to tell

    Votes: 3 30.0%

  • Total voters
    10
Loren Booda
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Do you think there are more stars in our Milky Way galaxy, or galaxies in the observable universe?
 
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Not at all. Estimates suggest that there as many galaxies in the observable universe as there are stars in the Milky Way.

Edit: I guess I misread the question. I thought it was "are there more stars in the MW than galaxies in the universe."

Yes, it's too close to tell. I agree with Dave.
 
Last edited:
I don't know that this really needs to be a poll - we have good evidence for the number of observable galaxies: the Hubble UDF. By extrapolation, if we repeated the HUDF and covered the entire sky, we'd see about 150 billion galaxies. It is believed that the Milky Way contains sonewhere in the neighborhood 200 to 400 billion stars.

So we're not there yet, but it wouldn't surprise me at all if we can peek just a little deeper and get a whole lot more.
 
I think that the two being within the same order of magnitude would constitute 'too close to tell'.
 
More galaxies in the observable universe. Why?

As time progresses, we will be able to see more light from the furthest galaxies, numbering in the billions, and steadily increasing, compared to the number of stars in the Milky Way, which are decreasing.
 
While Hubble did do an excellent job, I still think there are more galaxies in the observable universe than stars in our galaxy. There will be greater telescopes in the future, which will look even deeper into the cosmos.
 

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