It also carries a hopping spacecraft called Grace designed to explore a crater near the landing site, and MAPP, a small rover from the Colorado company Lunar Outpost. Athena entered lunar orbit ...

NASA GRACE (2002-2017) and GRACE Follow-On (GRACE-FO; 2018-present) satellite missions consist of two identical satellites following each other at a distance of about 200 km in the same polar orbit at ...