Don't bring them back maybe, invest in developing ways to get more complex testing equipment to mars? Obviously there are tests where this is impractical, if not impossible, but I always loved the idea of being able to land like a robotic controlled science center there.
this post was submitted on 16 Apr 2024
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Two words: thermonuclear cannon
Break the problem into parts. Design a system to get sample canisters into martian orbit. Design a Martian orbital system to catch the canisters and send them towards earth. Design an earth orbital system to intercept the canisters. Design a system to get the canisters from Earth orbit to the surface.
Each of these systems will be separate structures with different goals. Each one will be technically difficult and require new methods but each smaller piece will be easier to solve than the problem as a whole.
After R-ing TFA, this is pretty much their plan.
Just put a black neighborhood up there and the Federal Highway Administration will put a highway through it in no time.
Are SpaceX's mars suits going to have pockets?
Build a transitor. Big, big, big ask up front, but it seems like it'd make all other mars missions trivial by comparison. Start with a lunar transitor to facilitate the lunar base missions.
What's a transitor? Is it like an Aldrin cycler? What are the advantages?
I'm assuming that's what OP means. An Aldrin cycler is a cool idea and I'd love to see one developed some day, but I don't see how it helps unmanned missions significantly. You still need to independently launch and accelerate whatever you want to send to the same orbit for the rendezvous.
Makes sense for creature comforts (like life support and radiation shielding) for the long cruise but why bother for a robotic mission?
You really only need enough independent energy to get up to rendezvous, not enough independent energy to get back to earth. That saves on the amount of fuel you need to lift to have enough fuel to lift the fuel that you need to have to lift the fuel that you etc. etc. I'm assuming that getting an independent vehicle to Mars' surface for sample return with enough energy to make the trip home is the issue. An Aldrin Cycler (thank you) means you don't need to independently pack that fuel anymore.
If you're meeting the cycler in its orbit, you're already on a free return trajectory back to Earth by definition. You need another burn if you want to stop at Mars and another burn after that to leave and get back on a trajectory to Earth. In any event, you need to bring all of that propellant one way or another through some combination of independent launches. I'm still not seeing what a rendezvous with the cycler craft is doing for an unmanned mission. Any delta-v you take from the cycler has to be put back via refueling or reboosting at some point or another.