Hello guys. Im new here . I've been playing KSP for about 22 hours now and It was amazing and I love it so much. So I pick this one contract and its called World's First contract. I've done a lot of World's First contract such as launching the first rocket,Orbiting kerbin and escape the atmosphere. But this one contract that don't understand.Which is the "Return to Kerbin from Orbit". Click "Note" and it says " Slow Down a vessel in orbit and return it to the surface to achieve this goal" . How? What kind of ship should I design? Thank you