Using Chandra astronomers have detected Xrays from the remains of a supernova that was spotted from Earth over years ago The fullfield image shows Chandras view of M during a long observation where low medium and highenergy Xrays are red green and blue respectively The inset reveals the position of the source within the spiral galaxy that corresponds with optical shown in the other inset box and radio observations of a supernova called SN D This is the first time the remains of SN D have been detected in Xrays Chandras new Xray data provide important information about the nature of this explosion that astronomers think happened when a massive star ran out of fuel and collapsed