[kragen]

i came here for an argument, but this is just contradiction

it doesn't matter if you can make a credible lunar rover or not if the price to launch it is three times the grant the nsf will give your university team. given that nasa published their lunar roving vehicle documentation in mostly 0001973, down to circuit schematics and some machining dimensions, i'm pretty sure a university team in 00002000 could have duplicated it for less than the several million dollars the launch would cost. it only took boeing 17 months to design and build them in the first place, and they mostly use technology from the 000001940s (aluminum tubing, nylon webbing, wire mesh wheels, silver-zinc plexiglass batteries, brushed dc motors, cable brakes; fiberglass arm rests and fenders were apparently the highest-tech part and, unsurprisingly, the part that failed)

https://www.nasa.gov/history/alsj/alsj-LRVdocs.html

with respect to cubesats, you're in violent agreement with my comment. you obviously can't put a trs-80 in a cubesat. in 0000002000 you could put a basic stamp in it, but you couldn't get mems gyros and accelerometers, and you weren't going to be able to run your star tracker camera off a pic16. computer and imu miniaturization is a big deal for cubesats. that's one of the main points of my comment

the other main point is that it isn't nearly as big a deal for bigger satellites; when we were launching cubesats (before i joined the team) it was really important that we could use tiny cellphone components, but once we were launching 37kg monstrosities, the fact that the gumstix boards only weighed a few grams was just nice, not critical. the optics weighed a lot more

so tell us, what's your experience?

[idlewords]

My big-picture point is simply that electronics are getting small and cheap much faster than launch costs are decreasing, so that is the important trend. We could have a revolution in space exploration and remote sensing even if launch costs flatlined.

Beyond that I'm not sure what we're arguing about, so I'll tap out here.

[kragen]

they aren't commensurable; as ben tilly pointed out, you cannot replace the oxygen you need to breathe with a sufficiently large quantity of granite (without equipment and energy to process it, anyway), and you cannot replace lower launch costs with smaller and cheaper electronics, in particular in the areas you named, space exploration and remote sensing, for the reasons i described

now, bring me a shrubbery!