Russian space agency Roscosmos and top spacecraft manufacturer RSC Energia have begun simulating a manned landing on the moon, using a unique gravity imitation platform. The researchers used Selen, a unique platform simulating the moon's gravity, built by RSC Energia in the early 1970s. The experiments, performed by Mark Serov of Roscosmos' test flight department and Energia's cosmonaut instructor Alexander Kaleri, focused on the cosmonaut's ability to get in and out of the rover as well as walking on the lunar surface. According to the official site of Roscosmos, experts from RSC Energia are also working on an upgraded spacesuit which would allow easier walking on the moon, as well as the ability to get up unaided should the wearer fall down. "We conduct these experiments in order to see if there's anything we can recommend to the system developers in terms of streamlining work on the moon," said Alexander Poleshuk, deputy-head of RSC Energia's research and development division.