To deliver at the speed and scale required, the United Nations system must act together — with the full family of ...

Strongest evidence yet for an atmosphere on a rocky planet outside our solar system - a thick blanket of gases above an ocean of magma.

The blueprint outlines the equipment, landing-site criteria and environmental constraints that will determine what is ...

CAPE CANAVERAL, Fla. — NASA has lost contact with a spacecraft that has orbited Mars for more than a decade. Maven abruptly ...

The hunt is on for terrestrial exoplanets in habitable zones, and some of the most promising candidates were discovered ...