| Gamma-ray bursts shine so brightly that astronomers can spot them across the universe, as shown in this artist's conception. Astrophysicists Volker Bromm (UT Austin) and Avi Loeb (CfA) predict that approximately one-tenth of all bursts captured by Swift will come from stars that died during the first 1 billion years of the universe. Credit: David A. Aguilar (CfA) |
