N49 s Cosmic Blast . ... NASA Explanation: Scattered debris from a cosmic supernova explosion lights up the sky in this gorgeous composited image based on data from the Hubble Space Telescope. Cataloged as N49, these glowing filaments of shocked gas span about 30 light-years in our neighboring galaxy, the Large Magellanic Cloud . ... The magnetar hurtles through the supernova debris cloud at over 1,200 kilometers per second. ... U. Based on Astronomy Picture Of the Day ...