Hi guys
Recently, I was watching an video from Scientific exploration show. They mentioned the gamma ray from every direction. I mean they detected gamma ray coming from different directions every single day (not coming from the Sun). @_@ how do I put this in a speciific sentence... ok let me put it this way, our milky way galaxy also emitted gamma ray, but it takes about a hundred million years to travel to other region. Instead, scientist detected gamma ray coming from different direction every single day. I hope you get my point ><. Unfortunately, the show ended without telling the answer ^_^... I was wondering can someone tell me why? Cound it be the super massive blackholes or Quasars or dark energy? If the answer is the black hole, how is it possible? Blackhole doesn't emits light... so could it be something else?

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We come without a thing and gone without a thing. We need simple life. A cup of teas and a couple of meals per day, that is good enough. And this is my standard of living.

I don't believe the answer is known yet. There are gamma ray sources, "Gamma Ray Bursts", some observed each day in all directions.

Chandra X-Ray Obervatory Field Guide, page 3 of 5:

NASA: Solving the Mystery of Gamma-Ray Bursts

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The fact that Gamma ray bursts are detected daily and from every direction not just the local galaxy. I would sagest this has more to do with the extream energy out bursts from nova'ing super stars and the shear size of the universe.
We cant know all of these things, and may never. This could be a good thing. Becouse if one of these things ever happens around here, We are gone. Planet Earth steralized in a flash. Not a good plan. cancel that thought.