When scientists aimed the European Space Agency's X-ray observatory, XMM-Newton, at two mysterious lights on the outskirts of the Large Magellanic Cloud, they discovered an unexpected source: two previously unknown supernova remnants.
"When a star dies, it can explode in a supernova, causing a strong shock wave and forming an interstellar object called a supernova remnant," wrote an international team of scientists in a paper outlining the discovery.
