Supernovas are the spectacular ends to the lives of many massive stars. These explosions, which occur on average twice a century in the Milky Way, can produce enormous amounts of energy and be as bright as an entire galaxy. These events are also important because the remains of the shattered star are hurled into space. As this debris field (also called a supernova remnant) expands, it carries the material it encounters along with it. Astronomers have identified a supernova remnant that has several unusual properties. First, they found that this supernova remnant, known as G352.7-0.1 (G352 for short), has swept up a remarkable amount of material, equivalent to about 45 times the mass of the Sun. Another atypical trait of G352 is that it has a very different shape in radio data compared to that in X-rays. Most of the radio emission is shaped like an ellipse, contrasting with the X-ray emission that fills in the center of the radio ellipse. G352 is found about 24,000 light years from Earth in the Milky Way galaxy. Release date April 10, 2014.