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View Full Version : How Many Galaxies Have We Discovered?



Fraser
2009-Aug-03, 07:20 PM
Astronomers think that there are hundreds of billions galaxies in the universe, however the exact number is not known. But astronomers should know how many galaxies we've actually seen and discovered, right? Well, not necessarily. We dont know, says Ed Churchwell, professor of astronomy at the University of Wisconsin-Madison. We know its a [...]

More... (http://www.universetoday.com/2009/08/03/how-many-galaxies-have-we-discovered/)

AndrewJ
2009-Aug-04, 03:24 AM
Anyone recall the theory that very distant galaxies (such as in HUDF photo) are nearby galaxies (to us) whose light has gone all the way round our curved universe? Not sure if that is still considered possible but if so would obviously reduce the galaxy count.

I have seen six galaxies so far with my binocs.

George
2009-Aug-05, 08:38 PM
According to Dr. Dave Leckrone, lead Hubble scientist, it is expected that they will conduct what he calls an Ultra Ultra Deep Field (U2DF) with hopes of snagging some z= 10 galaxies. This, no doubt, will revise the "observable universe" galaxy count.