Massive Supernova Explosion Observed for Two Years
An explosion of a new massive form of supernova has been observed by astronomers for the last two years before finally fading out. The explosion (illustrated by NASA at right, below) generated 50 to 100 times more energy compared to a typical supernova outburst.
The star, named SN2007bi, was first observed in early 2007. Astronomer Avishay Galyam of the Weizmann Institute of Science in Rehovot, Israel said of the stellar observation as, “It was very, very slow. I came back after a week, after two weeks, after a month and five months and it was still about the same brightness.” The star has a size 200 times compared to our very own sun.
The star was classified as a pair-instability supernova, which releases protons so energetic that they create pairs of electrons and their anti-matter opposites, positrons. When electrons and its anti-matter positron meet, the star collapses. This theory has been predicted for decades and only now has it been observed from space.