JAXA’s MMX Enroute to Mars To Return Samples of Phobos
Japan launched a spacecraft to fetch rock from Mars's moon Phobos, the first sample return from any moon other than Earth's. It won't reach Mars until August 2027 and won't bring the samples home until 2031, but the haul could settle whether Phobos is a captured asteroid or a chunk blasted off Mars.
— via SpacePolicyOnline, Marcia Smith