Exploding star is the brightest supernova ever seen
![galaxy that's home to supernova ASASSN-15lh](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/01/ticker_brightsupernova_free.jpg?fit=860%2C460&ssl=1)
A galaxy 3 billion light years away (left, seen in 2014) blazes with the light (right, seen in 2015) from the brightest known supernova, dubbed ASASSN-15lh.
The Dark Energy Survey, B. Shappee and the ASAS-SN team