Travelling at the speed of light, it would take you almost two years to traverse the central ring of SN1987A It's like a celestial pearl necklace. This is an image of a supernova - an exploded ...

SNR G309.8+00.0 is a supernova remnant lying exactly on the galactic plane, first discovered in radio wavelengths about half a century ago. It appears as a well-defined shell of elliptical shape ...