The many sides of the supernova remnant Cassiopeia A. Located 10,000 light-years away in the northern constellation Cassiopeia, Cassiopeia A is the remnant of a once massive star that died in a ...

Explore the Soul Nebula (IC 1848), a star-forming region in Cassiopeia. Learn its clusters and why it's a favorite for astrophotographers.

Over 2 decades of Chandra X-ray Observatory views of the Crab Nebula and Cassiopeia A have been time-lapsed. The Chandra team explains here. Credit: NASA/CXC/A. Hobart Ozzy Osbourne’s cause of ...