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All the equipment would need to be radiation-hardened, though, and radiation-hardening is pretty expensive, although maybe easier in low-Earth orbit. https://e
by photochemsyn 3y ago
All the equipment would need to be radiation-hardened, though, and radiation-hardening is pretty expensive, although maybe easier in low-Earth orbit.
https://en.wikipedia.org/wiki/Radiation_hardening https://en.wikipedia.org/wiki/Radiation_hardening
- Majestic121 3y agoCould be the walls of the hangar to be hardened, not necessarily the whole equipment. I'm not sure if it would be less expensive though
- themanmaran 3y agoIt's just heavier that way. The easiest way to rad harden things is to stick them in a big lead box. But that's not ideal for shipping things to space. Alternatively I've seen some companies successfully rad-hardening from the software level. Effectively software that is tolerant to random bit flips.
- JumpCrisscross 3y ago> easiest way to rad harden things is to stick them in a big lead box Or work in a permanent shadow. Cosmic rays are easier to deal with than solar radiation.
- shagie 3y agoThis makes power generation a bit more challenging. There are sun synchronous orbits (and the orbit at the dawn/dusk terminator is an interesting one - https://en.wikipedia.org/wiki/Sun-synchronous_orbit https://en.wikipedia.org/wiki/Sun-synchronous_orbit ), but there isn't an easy orbit around the Earth such that it is always in shadow... or rather, that's the Earth/Sun L2 point... which is where the JWST is. At that distance you lose the magnetic shielding of the Earth (and makes it even more expensive to get materials to and from it).
- ianburrell 3y agoAlso, the equipment either needs to be made to work in vacuum or have to maintain atmosphere for it.
- dotnet00 3y agoConsidering that most production in space (with even near future launch costs) would mainly only be worthwhile if the resources were also obtained from space, I don't think radiation shielding will be as much of an issue, since if you're doing ISRU, you can gather enough mass around the facility to handle shielding. For chip fab in particular, since current processes require a lot of water, and water is very good as radiation shielding, such a facility in space would probably just store water in the walls.
- aziaziazi 3y agoWell problem solved then ! Just find a lot of water in space not too far from earth, or a cheap way to create it in orbit.
- dotnet00 3y agoYeah, that's why I said that most things aren't worth producing in space without the ability to obtain resources from space. Kinda pointless if you just have to launch the water from Earth.
- marcosdumay 3y agoThe factory needs to be shielded. You can't really harden fine processes. Right now, space manufacturing makes sense for exactly nothing. With enough research, it can in theory make sense for almost anything.
- wongarsu 3y agoIn (very) low earth orbit you can get by without radiation hardening. The ISS uses HP zbooks (and before that Thinkpads) and apparently they only really modify cooling and power, without any changes for radiation hardening. Seems like they are reliable enough for their job and just need the occasional reboot. For more critical systems you could probably get by with three computers voting on the result, and if they disagree the outlier gets rebooted (a fairly standard setup in aviation and space)
- idiotsecant 3y agoIt turns out space is full of big floaty rocks that you could hollow out and put your factory inside.
- heavenlyblue 3y agoAnd how many of these big floaty rocks are close enough go Earth?