I visited various celestial bodies, both in stock and modded KSP 1, and yet Duna is the place I find myself always returning to: relatively small dV required to reach it, enough gravity for quick surface traversal, atmosphere thin enough to allow brutal reentries but at the same time just so thick enough to fly and even land planes. Pretty much everything I could do on Duna I did it: from simple fly-bys to non-refuelable SSTOs to even circumnavigating the entire planet on land With the rele