An amateur astronomer discovered a supernova in the galaxy Messier 95 on March 16th, 2012. Two weeks later, the supernova continues to shine bright. Here’s a picture of M95 I took earlier this week. The supernova is the star to the lower right of the galaxy core. No one knows for sure when the supernova first erupted, but this object is not seen in pictures of the galaxy taken before March 20th.
Messier 95 is an estimated 38 million light years away from Earth, which means the star in this galaxy would have exploded over 38 million years ago. A supernova is the most powerful release of energy in the Universe. This supernova from a far distant galaxy outshines some of the other stars in the picture, which are all in our local Milkyway Galaxy. This gives you a relative idea about how bright and powerful supernovas are.