It's also quite easy to space travel outside of gravity well. Just take any piece of ice, drill yourself inside it and use thick ice walls as shelter. Mount som

It's also quite easy to space travel outside of gravity well. Just take any piece of ice, drill yourself inside it and use thick ice walls as shelter. Mount some engines. If you're used to living in such environment you can be having a normal life while going around in it. Fusion as power source, likely. Earth civilization is wondering why it can't see or hear anyone while almost literally living inside a beacon.