Rover findings indicate stratified lake on ancient Mars

A long-lasting lake on ancient Mars provided stable environmental conditions that differed significantly from one part of the lake to another, according to a comprehensive look at findings from the first three-and-a-half ...

'Halos' discovered on Mars widen time frame for potential life

Lighter-toned bedrock that surrounds fractures and comprises high concentrations of silica—called "halos"—has been found in Gale crater on Mars, indicating that the planet had liquid water much longer than previously ...

Europe launches fresh satellite pair for sat-nav system

Europe's Galileo sat-nav system, a rival to America's GPS, took a step closer to becoming operational Tuesday with the launch of a fresh pair of satellites to join a dozen already in space.

Jason-3 begins mapping oceans, sees ongoing El Nino

Just over a month after its launch, Jason-3 has produced its first complete science map of global sea surface height, capturing the current signal of the 2015-16 El Niño in the eastern Pacific Ocean.

Image: Final mirror installed in James Webb Space Telescope

Inside a massive clean room at NASA's Goddard Space Flight Center in Greenbelt, Maryland the James Webb Space Telescope team used a robotic am to install the last of the telescope's 18 mirrors onto the telescope structure.

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