Credit: NASA/Swift/Stefan Immler, et al.
The extremely luminous afterglow of GRB 080319B was imaged by Swift's X-ray Telescope (left) and Optical/Ultraviolet Telescope (right). This was by far the brightest gamma-ray burst afterglow ever seen.
...is halfway to the beginning of the Universe!
Record outburst of gamma rays recorded by Swift
This is an illustration of what we think cause of the immense gamma ray outburst - a star collapsing and becoming a black hole. (NASA).
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