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en.wikipedia.org/wiki/Galaxy

A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and ... Many galaxies are thought to have black holes at their active centers. ... galaxy, the Milky Way, to distinguish it from the other galaxies in our universe. ..... The lack of luminosity is because there is a lack of star-forming gas in the ...

www.nasa.gov/feature/goddard/2016/hubble-reveals-observable-universe-contains-10-times-more-galaxies-than-previously-thought

Hubble Reveals Observable Universe Contains 10 Times More Galaxies ... there are at least 10 times more galaxies in the observable universe than previously thought. ... in astronomy is that of just how many galaxies the universe contains.

www.theatlantic.com/science/archive/2016/10/so-many-galaxies/504185

Oct 14, 2016 ... New research estimates there are 2 trillion galaxies in the observable ... in the observable Universe is 2 trillion, more than 10 times as many as ...

www.space.com/25303-how-many-galaxies-are-in-the-universe.html

Apr 1, 2014 ... Astronomers say there are 100 billion to 200 billion galaxies in the universe. But accurately counting the number of galaxies depends on ...

www.physics.org/facts/sand-galaxies.asp

According to the best estimates of astronomers there are at least one hundred billion galaxies in the observable universe. They've counted the galaxies in a ...

phys.org/news/2017-01-universe-trillion-galaxies.html

Jan 16, 2017 ... Astronomers have long sought to determine how many galaxies there are in the observable universe, the part of the cosmos where light from ...

www.spacetelescope.org/news/heic1620

Oct 13, 2016 ... The group came to the surprising conclusion that there are at least 10 times as many galaxies in the observable Universe as previously thought ...

www.universetoday.com/30305/how-many-galaxies-in-the-universe

Nov 1, 2016 ... The wonderful thing about science is that it's constantly searching for new evidence, revising estimates, throwing out theories, and sometimes ...

www.theguardian.com/science/2016/oct/13/hubble-telescope-universe-galaxies-astronomy

Oct 13, 2016 ... There are a dizzying 2 trillion galaxies in the universe, up to 20 times ... Scientists have puzzled over how many galaxies the cosmos harbors at ...