Astronomy Picture of the Day . A GRB 000301C Symphony . ... STIS , HST , NASA Explanation: Last March, telescopic instruments in Earth and space tracked a tremendous explosion that occurred across the universe. A nearly unprecedented symphony of international observations began abruptly on 2000 March 1 when Earth-orbiting RXTE , Sun-orbiting Ulysses , and asteroid-orbiting NEAR all detected a 10-second burst of high-frequency gamma radiation . ... March . ... NASA Official: Jay Norris. ...