CAPE CANAVERAL, Florida — A spacecraft has beamed back some of the best close-up photos yet of Mercury's north pole.
The European and Japanese robotic explorer swooped as close as 183 miles (295 kilometers) above Mercury's night side before passing directly over the planet's north pole. The European Space Agency released the stunning snapshots Thursday, showing the permanently shadowed craters at the top of of our solar system's smallest, innermost planet.