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from thread linked in op
Interestingly enough, though, the majority of class M stars are red dwarfs. So, this immediately puts a single question in my mind: could Mirach be a red dwarf gravitationally microscoped to look like a red giant?
November 22, 1999: Wrecks between two galaxies were a common occurrence in the early cosmos. But pileups among several galaxies? Astronomers conducting a three-year survey of ultra-luminous infrared galaxies (ULIRGs) have discovered more than 24 of them involved in three-, four-, or even five-galaxy smashups. Astronomers have made this discovery by analyzing Hubble telescope pictures of these pileups, including the nine presented here. These results offer a snapshot of what conditions were like in the early universe, when galaxy collisions were
But something may be amiss with these LRGs. Shawn Thomas and his colleagues have found structures in the Universe stretching over three billion light years, containing an overabundance of LRGs from what our theory predicts! In other words, from looking at these LRGs, the Universe, on these very large scales, is less smooth than we expect! Previous studies -- for instance, with the Sloan Digital Sky Survey -- had seen observations in line with predictions, but there are a number of interesting possibilities for what these structures mean.