As of 1.1, no. Later when they add the feature we will be able to while floating in space. Not sure when that will be added however. The use key (F) is currently bound to strafe down for the thrusters. So, unfortunately unless you’re against the landing pad, you cannot get out of your ship.
I remember that before 1.1 (haven’t checked now, but that might have not changed) exit seat, use and strafe down could be bound to different keys… it’s just that by default they are using the same keybinding.