Today I am bringing space news. Just a short ones. So in last post I mentioned gamma-ray bursts. I found out that NASA found one GRB happening over and over again. As you can see on the picture there is real repeating of many and many GRBs.
Those come from black hole, a supermassive black hole from active galaxy 5,000,000,000 light years away.
It has accretion disk but scientists are not sure yet why it is in such a periods so one of many hypothesis is that there is actually second black hole which as its orbits the first one makes changes to the disk which then make some bursts bigger than other.