Incomplete Galaxies at Edge of Universe
Due to the speed of light and the range of the visible
universe, do any galaxies at the edge of the visible universe appear
as incomplete galaxies because the light from the invisible parts
have not yet reached us?
No. When we look far away in space, we also look far back in time.
The farthest back we are currently able to "see" (2010) is to the
time of recombination, several hundred thousand years after the big
bang. (These signals are the cosmic microwave background.) Galaxies
had not formed by that time.
Richard E. Barrans Jr., Ph.D., M.Ed.
Department of Physics and Astronomy
University of Wyoming
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Update: June 2012