Summer evening skies are home to some classic constellations. One of them is Scorpius the Scorpion, the tenth brightest ...

AeroVironment and NASA's JPL have shown off a wild concept for deploying six helicopters above the surface of Mars.

Look west at sunset to find the razor-thin crescent moon hanging less than 10 degrees above the horizon. Regulus will appear ...

Visible on the planet itself is a dark patch near the top, marking the frigid northern polar cap, where temperatures dip to ...