HOW TO RECOGNISE SUPERNOVAS
-
LOOKING UP SOME EXAMPLES OF SUPERNOVAS AND THEIR REMANENTS JUST TO TRAIN MY EYES TO THIS NEW FASCINATING TASK OF BUBBLING, I HAVE FOUND THIS ONE THAS IS SUPOSERD TO BE A SUPERNOVA REMANEN....
MY QUESTION IS HOW HAS BEEN INFERED THAT'S A SUPERNOVA AFTER A LONG PERIOD AFTE THE EXPLOSION?
THANKSPosted