Spacecraft

A Harvard professor devises a scheme to detect extraterrestrials by tracking how they might commute from one world to the next

The spacecraft makes one last close flyby of Saturn's pockmarked moon Dione August 17, in search of direct evidence that the moon is geologically alive and active

After more than a year in orbit around a comet, the European Rosetta spacecraft and its icy dance partner are hitting a huge milestone: their closest approach to the sun

Hydroponic farming is one small step toward self-sustaining space habitats

China, Russia and the U.S. are developing and testing controversial new capabilities to wage war in space despite their denial of such work

New commercial satellites that promise constant close-ups of Earth are a boon to emergency responders and police but also raise privacy concerns

Two rival teams of astronomers are racing to capture unprecedented images of giant planets around other stars. What they find could change the future of planet hunting

Instruments on the Rosetta spacecraft’s Philae lander discovered nitrogen and amino acids, key ingredients for life, on comet 67P Churyumov-Gerasimenko

A pilot error was responsible for the crash that killed one person and seriously injured another last October

NASA Ames researcher, former astronaut muse on the challenges and advantages of spending time on the high-gravity planet

The planet, Kepler 452 b, is likely rocky and orbits in its star’s habitable zone where liquid water can exist

Early images from New Horizons' encounter with Pluto reveal an extraordinary surface of strange mountains and varying deposits of light and dark material