It is hard to imagine being in orbit, not only because of weightlessness, but also because of the feeling of losing one’s orientation in space. The sense of direction becomes completely individual in conditions of weightlessness. Reference points for orientation are transferred from space to the individual. A consequence is that new conventions for orientation are generated in the visual perception of immediate and distant surroundings. Besides making a bodily entry into a state of zero gravity, the individual must also enter a changed visual field and horizon, which is in an unstable dynamic relationship with the apparent horizon of the visual field.