Mars

英 [mɑːz] 美[mɑrz]

But they can attain more distant orbits; NASA plans for most of its future Earth-escaping payloads to the moon and Mars especially to carry CubeSats.

Nasa is worried about two things: recovery time once astronauts return home, and, more importantly, how to maintain strength and fitness for the two and a half years or more that it would take to make a round-trip to mars.