Spacecraft

Proposals include a hunt for near-Earth objects, a dive into Venus’s atmosphere and a voyage the metallic core of a protoplanet

ASTROSAT aims to study star-birth regions and high-energy processes, including binary star systems of neutron stars and black holes

Intriguing ridges add to dwarf planet's geologic mysteries

The evening of September 27 will be the fourth time in the last 17 months that the moon becomes immersed in the Earth's shadow

Sluggish production of nuclear fuel could make solar power the preferred choice for the agency’s outer-planets missions

An Alpha Magnetic Spectrometer cooling-pump failure raises questions about the instrument's longevity

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