Deep-Sky Objects, Galaxies I’ve seen Astronomy magazine label M33 as the Pinwheel Galaxy, but I thought M101 was the Pinwheel Galaxy and M33 was the Triangulum Galaxy. Which is correct?
Deep-Sky Objects If space is only a few degrees above absolute zero, how can hot nebulae gases from exploded stars stay warm for a long time?
Science Is the universe infinite or finite? Or is it so close to infinite that for all practical purposes it is?
