Daniel E. Reichart is an American astronomer. Reichart's dissertation research on distant, cosmic explosions called gamma-ray bursts was ranked by Science Magazine as one of the top ten discoveries in science in 1999, and in 2003 earned him the Robert J. Trumpler Award, for top astrophysics dissertation research in North America. In 2005, he and his students discovered the most distant explosion in the universe yet known, a gamma-ray burst that occurred 12.9 billion years ago, when the universe was only 6% its current age.