The technology originally measured fluid shifts inside astronauts hamming it up in space.

Two astronauts are set to begin the four-spacewalk clean up of a balky station gear.

Endeavour shuttle astronauts will scan their spacecraft's heat shield today.

A simulation shows how thunderstorms create jet streams on giant planets.

Europe develops re-entry spacecraft that could return astronauts and cargo to Earth.

A NASA probe is set to make the closest flyby yet of an icy Saturnian moon.

A Mercury probe has begun beaming back images from its second flyby.

A star survey shows that galaxies may only seem similar on the surface.

A NASA spacecraft zoomed past Mercury for the second time early Monday.

A space probe prepares for its second Mercury flyby next Monday.

NASA pushes back space shuttle mission to Hubble by four days.

The solar wind is the lowest recorded in the 50 years since the Space Age began.

Cloud movements on Venus reveal wind speeds and patterns.

Simulation shows that sun's circular orbit does not necessarily mean it stayed put.

Nuclear power offers advantages for a long-term stay on the moon.

Rocket-powered racers receive engine replacements following their earlier public debut.

Shuttle astronauts are ready for risky Hubble flight with rescue plan in place.

Hubble gets a host of upgrades in a final shuttle visit.

Comets lurking as asteroids can surprise scientists by flaring up.

A planetary map-mapmaker targets Mercury and the moons of Saturn.

Clouds are increasingly appearing at the edge of Earth's atmosphere.

Magnetic forces hold together 100-million-year-old gas threads in a galaxy.

Microwave beams could help extract water ice from the moon and Mars.

A changing magnetic field could expose satellites to damaging radiation storms.