GoKawiilNASA's Mars Odyssey and MRO orbiters mark two decades of operation
NASA's Mars Odyssey spacecraft, which reached Mars in October 2001, and its younger counterpart the Mars Reconnaissance Orbiter have both far outlasted their original mission timelines of just a few years. The two orbiters continue to gather data on Martian ice and surface changes while also relaying communications from every NASA rover on the surface back to Earth.