United Arab Emirates Space Agency/Mohammed bin Rashid Space Centre/LASP/EMM-EXI/Handout via REUTERS.
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Space travel beyond our moon will require a huge shift in space propulsion.
That's partly because quicker flights mean crews are exposed to less radiation during the journey.
A couple of ideas are in the works to achieve that: nuclear thermal propulsion and ion propulsion.
The future of human space exploration, such as visiting our moon or even Mars, could be essential for upcoming generations. But despite that and the recent renewed interest in space travel thanks to companies like SpaceX, humans traveling beyond our moon will require a paradigm shift in space propulsion.