The system, powered by solar cell panels, transmitted at 136.17 MHz and 136.02 MHz with a minimum power output of 45 mW. Beyond its primary communications mission, Echo 2 contributed to global ...

This remarkable feat became necessary because the spacecraft's primary thrusters, which control its orientation, have been degrading due to residue buildup. If its thrusters fail completely ...

The spacecraft delivered two batches of human stem cells, as reported by Laura Ungar for the Associated Press (AP). Researchers will observe how the cells behave in zero gravity. Stem cells ...