Space NEWS #2

Hi,
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
 graph shows Fermi Large Area Telescope data from August 2008 to July 2015 for gamma rays with energies above 100 million electrhappening 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.
Dragallur

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