“Starting this weekend, the closest supernova found in at least 25 years will be visible from your backyard with just binoculars or a small telescope. The exploding white dwarf star is currently brightening in the Pinwheel Galaxy, nestled, from our perspective, within the Big Dipper.
…Most supernovas spotted at the Palomar Observatory are around 1 billion light-years away, far too distant to be seen by amateurs. At only 21 million light-years away, the newly discovered, violently exploding star is a close cosmic neighbor. In the video … Berkeley Lab’s Peter Nugent describes how to spot this supernova, set to reach peak brightness Sep. 9.” (via Wired.com).