... Tonight's Sky . ... Star Atlas . ... stars . ... Supernova explosions stay in shape . This discovery shows that the remnants retain information about how the star exploded even though hundreds or thousands of years have passed. ... These two supernova remnants are part of a new study from NASA's Chandra X-ray Observatory that shows how the shape of the remnant is connected to the way the progenitor star exploded. ... Only registered members of Astronomy.com are allowed to comment on this article. ...