I knew I was alone,” he observed later, “in a way that no earthling has ever been before.” That quote is immortalized on a ...

After its voyage past Mars, Mariner 4 maintained intermittent communication with JPL and returned data about the interplanetary environment for two more years. But by the end of 1967, the spacecraft ...

The annual competition for professional and amateur astrophotographers released its shortlisted images, which capture the ...

The more scientists study the Red Planet, the more they find unusual objects and patterns scattered across Mars' surface. As ...

Earth has rarely looked as remarkable as it does in this stunning shot (above) captured by NASA astronaut Don Pettit from the International Space Station (ISS).