After a long time reading, i decided to post here too. Started my first attempt on getting any ship back to Kerbin after Orbitig another Planet. So, I launched my Artreus (Transport vessel, with dockable stages (Apargus Staging) with lots of dV (3 Stages with an overall dV of about 15000m/s) a huge dV overkill vor orbiting duna, ike and back to Kerbin. Anyway instead of a lander or Satelite i docked a Sience module containing a few Material Bay's, Goo containers and so forth. I intended to leave Artreus in LKO for refueling (and redocking, as I used up one of the stages) and deorbit the Sience Module. Back in Kerbin Orbit i recognized i forgot any propulsion on this module.. so I decided to try aerobrakeing with the artreus, so i can undock and circularize Artreus's orbit afterwards and let the module deorbit. With my balls of steel I forgot to quicksave, and crushed the artreus on Kerbin. (I thougt "I'm going fast, i need to aerobrake deep into the atmosphere" ) Luckily the module survived(parachutes ftw) with its 2k sience on board. Next Mission: do the same to Eve and Gilly.