Methods For Slow Manned Missions
Slow interstellar travel designs such as Project Longshot generally use near-future propulsion technologies. As a result, voyages are extremely long and risky, starting from about one hundred years and reaching to thousands of years. Crewed voyages (speculative) might be one-way trips to set up colonies.
Nevertheless, serious if preliminary discussions are taking root for the ~100 year time scale, with trials of the MMSEV/Nautilus-X concept preliminary to asteroid exploration in preparation.
The duration of a slow interstellar journey presents a major obstacle. The following are some proposed solutions:
Read more about this topic: Interstellar Travel
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