-- Every day powerful explosions of gamma radiation illuminate random parts of the sky. We don't know what causes them and you can't see them with the naked eye. They're called "gamma ray bursts."
Where do they come from? Answer: from every direction in the cosmos, and they come from very far away.
This is an amateur Astronomy SIte. What can an amateur do in the world of Gamma Rays?
What's all this about a High Energy Astrophysics Workshop?