At one time, an astronaut was in a very high orbit. He said, it was like experiencing God. Insurgents in the government and infrastructure, started nay-saying and defunding the space program.
Satan was given dominion over the Earth, but no farther. Earth is his realm.
If you get far enough away from the Earth, Satan has no power over you (unless minions are with you).
Minions will be the elite, allowed to wander a short distance away from their master.
Humans will not go into deep space.