MELOS (Mars Exploration with Lander-Orbiter Synergy) is a planned mission to Mars, consisting of an orbiter (MELOS-1), and a lander (MELOS-2). It would be the successor to the comet probe Suisei (PLANET-A) the Mars probe Nozomi (PLANET-B), and the Venus probe Akatsuki (PLANET-C). MELOS-1 was planned to be launched in 2018, and would also have up to four small landers.MELOS: Japan's Mars Exploration Plan for 2020s. MEPAG in Lisbon, Portugal (16–17 June 2011)
