The European Space Agency’s new probe, Biomass, will spend five years orbiting the planet and gathering radar imagery of ...

NASA's ER-2 science aircraft flew instruments designed to improve satellite data products and Earth science observations.

Nevertheless, despite setbacks, Vanguard 1 did reach orbit on March 17, 1958 as the second U.S. satellite. And guess what? While Explorer 1 reentered ... the oldest orbiting satellite of any ...