GLAST is an observatory that will be launched in 2007, The Large Area Telescope (LAT) provides an enormous improvement in sensitivity, FOV, and much finer angular resolution compared to previous high-energy telescopes.

The LAT is an important window on a wide variety of high energy phenomena, including black holes and active galactic nuclei; gamma-ray bursts; the origin of cosmic rays and supernova remnants; and searches for hypothetical new phenomena such as supersymmetric dark-matter annihilations and exotic relics from the Big Bang.