The left image, taken with the Hubble Space Telescope, shows the body of M82 in blue and hydrogen gas breaking out from the central starburst in red. The VLA image (top left) clearly shows the supernova (SN 2008iz), taken in May 2008. The high-resolution VLBI images (lower right) shows an expanding shell at the scale of a few light days and proves the transient source as the result of a supernova explosion in M82. Credit: Milde Science Communication, NASA, ESA, and The Hubble Heritage Team (STScI/AURA), A. Brunthaler, MPIfR