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> Going to Venus would allow us to simulate a mars free return trip, but in only 1 year (which would mean for a mars-class ship, a minimum safety factor of 3 (r
by xani_ 4y ago
> Going to Venus would allow us to simulate a mars free return trip, but in only 1 year (which would mean for a mars-class ship, a minimum safety factor of 3 (really, six) for fuel, water, air, food, medical supplies etc), instead of a 3 year mission with only a safety factor of 2.
Simulate what ? Sitting in place ? We can do that on earth orbit. Engines running for long time ? No need for people aboard for that.
- turndown 4y agoI think space is one of those places where you can appeal to unknown unknowns being a major risk factor and everyone agrees. But I personally think that the better option is to just do all of this on the moon. Making a human-habitable base on the moon, to me, still makes the most sense for preparing for habitation on other worlds.
- readams 4y agoAvoiding the need to wait 26 months between launch windows certainly reduces the degree of difficulty. Going from "oh we wish we had X that we didn't think of" to having it is literally almost 3 years on Mars.
- xani_ 4y agoIt's not to avoid the difficulty, it's to make iteration safer and easier. Good luck seeing what failed if the craft that failed is flying somewhere between earth and mars
- Spartan-S63 4y agoFor one, leaving the safety of Earth's magnetosphere. We haven't really ventured far enough for radiation to not be tempered by Earth's magnetic field, from what I understand. It would shorten the duration of radiation and help study the effects on astronauts.
- xani_ 4y agoSo, go to moon. No real need to go to another planet just to irradiate some astronauts and in case shit hits the fan they have chance of surviving
- AstralStorm 4y agoPrecisely the goal of Gateway, of which Artemis/SLS are pieces.
- cratermoon 4y agoInterplanetary space is significantly different environment, compared to low earth orbit, for spacecraft and crews. The only knowledge we have of humans beyond the Van Allen Belts is from Apollo, for relatively short durations.
- tuatoru 4y ago> Engines running for long time ? Not with chemical rockets. Perhaps you meant "engines sitting idle for years in interplanetary space, and then restarting reliably".
- s1artibartfast 4y agoReally depends on the mission profile. If you are refilling in space for a "short" burn, it could still be longest in human history.