The universe is such a big place that it is easy to get baffled by the measurements that astronomers make. The size of UY Scuti, possibly one of the largest stars we have observed to date, is certainly baffling.
NGC 3576 is a giant HII region of glowing gas located about light years from Earth. HII (pronounced "H-two") regions are where stars are born from condensing clouds of hydrogen gas. - Credit: NASA/CXC/Penn State/L.Townsley et al.
RIP Comet ISON: Scientists Declare Famous 'Sungrazer' Dead After Sun Encounter / German amateur astronomer Waldemar Skorupa captured this spectacular photo of Comet ISON from Kahler Asten, in Germany, on Nov.