Btarlinian writes: "GLAST (the Gamma Ray Large Area Space Telescope) was launched yesterday at 1605 GMT. GLAST was built in a rather interesting manner, in that much of the work was funded by the Department of Energy. In fact, the main instrument on GLAST, the LAT was assembled at the Stanford Linear Accelerator Center. The LAT, which can detect gamma rays at energies between 20 MeV and 30, uses a rather interesting mechanism for observation. In fact it acts more as a particle physics detector. The telescope also carries the GLAST Burst Monitor, which will observe lower energy gamma rays and x-rays."