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SpiritualCatch6757 t1_iu5wsdr wrote

Gravity assist has been used by space craft long before Voyager and has continuously been used since.

Do you mean alignment of the outer planets for the grand tour? If it happened in 5 years, we'd miss it. It took over a decade to assemble and launch the Voyager probes.

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RealitySmasher47 OP t1_iu5xciv wrote

5 years was just something close enough that tech wouldn't advance too so it would still mostly be the same

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UmbralRaptor t1_iu6mcsa wrote

Propulsion technology doesn't advance that fast, assuming more or less present day stuff 10 or 20 years out is fine

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