➡ https://www.cydonis.co.uk/watershield/
Realistically speaking, we’re (homo sapiens) not leaving this solar system, (outside of fantasy in media) and most likely most intelligent life-forms don’t either, as any heliopause around any given star would be deadly to organic life.
Robots (such as the Voyager probes) don’t have to worry about cancer, food, water, air, or sleep, just their power running out. And even then the solar panels might just produce power again, after drifting for a long time, their CPU’s on standby to receive voltage, and thus waking, once more.
Governments of only four to eight year durations are not equipped for any kind of long-term thinking; they are by definition reactive rather than proactive, and/or pre-emptive, and thusly are ill equipped to think in terms of longer time-spans.
Thus, some things will likely remain in the realm of the working hypothesis or fantasy (Interstellar was a great movie). Impossible dreams, bursting at the seams…
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