Four views of planet Mercury showing surface detail by NASA: MESSENGER's highly successful orbital mission camae to an end, as the spacecraft ran out of propellant and the force of solar gravity caused it to impact the surface of Mercury on April 30, 2015. #Space #Mars #Mercury_Messenger
On March 17, the MESSENGER spacecraft became the first to orbit Mercury, the solar system's innermost planet. This is its first processed color image since entering Mercury orbit. Larger, denser, and with almost twice the surface gravity of Earth's moon, Mercury still looks moon-like at first glance.