In the past, astronauts had to be specially trained and physically very fit to survive in very small space capsules, but spacecraft size is no longer a constraint, making it possible to take ordinary people such as midwives, electricians and cleaners.
Neil – it's visible to the naked eye – meaning without using instruments – and it's reachable by spacecraft.
This spacecraft is powered by ion thrusters.
Against all expectations, the Apollo spacecraft made it safely back to Earth.