Astronomy Picture of the Day . ... What's causing those odd rings in supernova 1987A? Twenty five years ago, in 1987, the brightest supernova in recent history was seen in the Large Magellanic Clouds. ... The first identified compact galaxy group, Stephan's Quintet is featured in this eye-catching image constructed with data drawn from the extensive Hubble Legacy Archive. ... Aurigae Nebulae . ... Barred Spiral Galaxy NGC 1073 . ... A Message From Earth . ... At the West Wall of Aristarchus Crater . ...