From Mica
The Most Distant Explosion: Gamma Ray Burst 090423
On April 23, 2009, the Swift gamma ray satellite detected light from an explosion that was measured to have a redshift of 8.2--making it the most distant individual object we've observed, and evidence for the earliest star we know of that formed after the Big Bang. In this talk, I'll describe what gamma ray bursters are, and how it is that we can measure how far away they are. I'll also talk about the significance of this discovery when it comes to understanding the formation of the first stars and galaxies in our Universe."
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