Crewed expeditions in deep space may be a long time from now, if ever. Zero-gravity conditions and space radiation are deterrents, not to mention the psychological trauma of isolation in outer space and the exorbitant cost financially. The pioneers would have to be fit soldiers.
Source: tatoeba (10570979)
We still do not have the technology for travelling by crewed missions into deep space.
Source: tatoeba (10570995)
Many think that crewed travel into deep space isn't impossible.
Source: tatoeba (11021299)
Some people like me think that AI, Artificial Intelligence, will help in realizing future crewed interplanetary flights. AI will be able to solve engineering problems that humans are not able to solve.
Source: tatoeba (11518944)
Showing 4 of 6 available sentences.