Say hello to Mercury, that pesky rock that always seems to be in retrograde ruining your life. A spacecraft operated by the European Space Agency and Japan made its final fly-by over the planet ...

Caption This is an image of Mercury's tail obtained from combining a full day of data from a camera aboard the STEREO-A spacecraft. The reflected sunlight off the planet's surface results in a ...

(U.S. Navy photo) NRL’s Mercury Pulsed Power Facility Marks Two Decades of Innovation NRL’s Mercury Pulsed Power Facility Marks Two Decades of Innovation ...