NASA's Chandra X-ray Observatory has captured the largest data set yet of Jupiter's colorful lights called aurora, yielding a pretty picture that could help solve some mysteries about the phenomenon.
Arp 147 contains a spiral galaxy (right) that collided with an elliptical galaxy (left), triggering a wave of star formation. Many of these newly-born massive stars raced through their lives and ended with supernova explosions, some as black holes. A ring of these black holes can be seen in the Chandra data (pink) around the spiral galaxy. Chandra X-ray Observatory