Dr. And collisions between galaxies were more common billions of years ago when the universe was smaller and more crowded. Or some of them could be the most distant black holes taproom observed — perhaps as far as 13 billion light-years. By detecting the distinct signature of hydrogen Codeine (COD/FedEx) these galaxies, Malhotra and her colleagues are able to confirm that 16 among 22 are really at the distances their colors suggest. Surprisingly, the distant galaxies are similar in many ways to their considerably closer descendants. The Spitzer images are fantastic," said Koekemoer, who led the effort to compare and identify the missing X-ray black holes in the Spitzer images. Sangeeta Malhotra, Norbert Pirzkal, Chun Xu, and taproom Rhoads, of the Space Telescope Science Institute in Baltimore, Md., are reporting these results June 2 at the American Astronomical Society's annual meeting in Denver, on beha ... Read more »