Scientists working in the field of space exploration and travel in the Universe, believe the planet “space prison.” this comparison is quite justified, because the person may not himself willingly to leave the Earth.
The earth is a space prison for the human race. Humanity and all life on Earth, appeared with a large expenditure of cosmic energy. Now the people, to restrain the forces of nature, can’t just leave the Earth, becoming “prisoners” rushing in outer space “prison”.
Only after hundreds or thousands of years, people may be able to visit other planets and maybe even dwell there, and while we all remain prisoners of a prison called Earth.