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Mysterious radio burst from space is unusually close and especially baffling Nadia Drake © Image by ASA, ESA and the Hubble Heritage Team (STScI/AURA) Discovered by the German astronomer Johann Elert Bode in 1774, M81 is one of the brightest galaxies in the night sky. It is located 11.6 million light-years from Earth in the constellation Ursa Major and has an apparent magnitude of 6.9. Through a pair of binoculars, the galaxy appears as a faint patch of light in the same field of view as M82. A small telescope will resolve M81’s core. The galaxy is best observed during April. This stunning Hubble image was assembled using observations in visible and infrared light. The galaxy’s spiral arms, which wind all the way down into its nucleus, are made up of young, bluish, hot stars formed in the past few million years. They also host a population of stars formed in an episode of star formation that started about 600 million years ago. Ultraviolet light from hot, y

Bryan gaenslerShami chatterjeeJohann elert bodeBrian metzgerNorthwestern university claire yeCornell universityColumbia universityUniversity of torontoNorthwestern university yeHubble heritage team stscCanada hydrogen intensity mapping experimentFlatiron instituteEuropean very long baseline interferometry networkUrsa majorMilky wayHubble heritage team