Quote from: groundbound on 04/10/2018 09:30 pmWhy would any nation-state ever fund a science mission of any sort at all? Oh that's right, it happens all the time.As I said, they do it for many reasons, including to offer highly qualified domestic job opportunities, to maintain and develop domestic technological capabilities, to subsidize domestic research and development, and for international soft power credibility. None of those goals are served by purchasing a ride from SpaceX or any other foreign supplier.
Why would any nation-state ever fund a science mission of any sort at all? Oh that's right, it happens all the time.
Quote from: envy887 on 04/10/2018 08:24 pmBarter is just another form of payment, one that SpaceX would undoubtedly accept if ESA had technology they wanted - e.g. long term ECLSS, or perhaps eventually nuclear powerplants for a Mars colony (some things are a lot easier if you're a nation-state).I think that it is very unlikely that SpaceX would choose to rely on a national or supranational—in the case of ESA—space agency for critical technology if at all possible. Space agency programs tend to be slow and ESA programs, partly due to its members' insistence on exact proportional funding allocation, are often even slower. On the specific topic of nuclear power, ESA has been talking about and doing preliminary work on 241Am based power systems for around a decade, with little to show for it.
Barter is just another form of payment, one that SpaceX would undoubtedly accept if ESA had technology they wanted - e.g. long term ECLSS, or perhaps eventually nuclear powerplants for a Mars colony (some things are a lot easier if you're a nation-state).
And Arianespace is not a space agency but a launch service provider. The space agency is ESA. ESA will not purchase from foreign corporations.There have also been rumors about ESA buying DreamChaser to stick it on Ariane. The only way that would happen is if the entire tech and manufacturing is transferred to Europe as part of some barter arrangement where a European company gets the money and the jobs. ESA is not in the business of simply purchasing off-the-shelf vehicles from foreign suppliers because that goes against the whole purpose of ESA.I'm pretty sure other national space agencies have pretty much the same policy. There is nothing to gain from flags and footprints if all you did is buy a ticket and pack a suitcase.
Quote from: Nibb31 on 04/10/2018 06:10 pmAnd Arianespace is not a space agency but a launch service provider. The space agency is ESA. ESA will not purchase from foreign corporations.There have also been rumors about ESA buying DreamChaser to stick it on Ariane. The only way that would happen is if the entire tech and manufacturing is transferred to Europe as part of some barter arrangement where a European company gets the money and the jobs. ESA is not in the business of simply purchasing off-the-shelf vehicles from foreign suppliers because that goes against the whole purpose of ESA.I'm pretty sure other national space agencies have pretty much the same policy. There is nothing to gain from flags and footprints if all you did is buy a ticket and pack a suitcase.Hmmm, well... I thought a lot of space agencies across the world get their astronauts to ISS buying Soyuz seats from the russians... not buying complete Soyuz ships, or setting a Soyuz production line... ESA is buying Soyuz seats from the Russians to get to ISS, why couldn't they do the same with a BFR ?
As far as the OP, if BFR flights are as cheap as envisioned, a lot of countries would probably want to do it.
If BFR flights are as cheap as envisioned, there are a few mining companies that will be queuing up.
Quote from: matt_ellis on 04/11/2018 05:58 pmIf BFR flights are as cheap as envisioned, there are a few mining companies that will be queuing up.I dont think so. In the foreseeable future space mining is only viable when launches are so expensive that its cheaper to mine asteroids than to launch stuff with rockets. And "stuff" pretty much is limited to fuel because any serious construction of complex parts is far more difficult than just "mining". If BFR is really as cheap as advertised, than mining is probably prohibitive expensive in comparison.
What bulk mined material could be valuable enough be both mined in asteroids and returned to earth via landing vehicles? Apart from the occasional speculation about He3, I just can't imagine any material that would be worth the huge investment in in-space infrastructure and the huge cost of transportation. Any candidates?
Quote from: Tulse on 04/12/2018 05:30 pmWhat bulk mined material could be valuable enough be both mined in asteroids and returned to earth via landing vehicles? Apart from the occasional speculation about He3, I just can't imagine any material that would be worth the huge investment in in-space infrastructure and the huge cost of transportation. Any candidates?Platinum group metals are often discussed. Iridium, for instance, sells for about $32,000/kg. There's a lot of room for that price to come down and still be profitable with even present-day launch costs, much less with an RLV-enabled launch cost under $2,000/kg.
Quote from: Semmel on 04/12/2018 06:26 amQuote from: matt_ellis on 04/11/2018 05:58 pmIf BFR flights are as cheap as envisioned, there are a few mining companies that will be queuing up.I dont think so. In the foreseeable future space mining is only viable when launches are so expensive that its cheaper to mine asteroids than to launch stuff with rockets. And "stuff" pretty much is limited to fuel because any serious construction of complex parts is far more difficult than just "mining". If BFR is really as cheap as advertised, than mining is probably prohibitive expensive in comparison.That logic applies in the case where the materials mined are then sent to Mars (or elsewhere off Earth). But there's also the case of mining materials that are valuable enough to be worth sending back to Earth. And for that, cheaper launches improve the viability.
Iron ships and iron men! If ships were to be made in space, say at a space dock, what would they be made of? No need to lift them out of the gravity well, just move from planet to planet or more likely, space dock to space dock. They could be quite massive and still be usable, no heat shields required. Of course, thrust to mass would still be a consideration, but not the deal breaker it is now.Add: Engines come up from Earth, propellant might be hydro-lox from water mined in space, fittings come from the most economical source.
Quote from: aero on 04/13/2018 01:32 amIron ships and iron men! If ships were to be made in space, say at a space dock, what would they be made of? No need to lift them out of the gravity well, just move from planet to planet or more likely, space dock to space dock. They could be quite massive and still be usable, no heat shields required. Of course, thrust to mass would still be a consideration, but not the deal breaker it is now.Add: Engines come up from Earth, propellant might be hydro-lox from water mined in space, fittings come from the most economical source.Why would you want massive iron ships in space? Rocket equation still applies. Minimal final mass gives exponentially better results in either or both travel time or tonnes of payload hauled.
One company has existing plans to send a bunch of prospecting satellites out to various asteroids they have identified as relevant: https://www.planetaryresources.com/ In a talk they explained the rationale. With SX going to Mars, and possibly the moon, and Bezos saying he wants to see thousands living and working in space, Planerary Resources has the long view: that in 10 years, they might start mining, in 20 years a market will develop... and they are placing themselves now. In 30 years? PR don't have to make a profit early on, just show there is a developing market for their products, and they will likely be cost effective. Once others catch on they will have a head start in surveying of asteroids, initial extraction experiments and therefore "ownership", experience with spacecraft, relationships with SX BO etc, spacecraft.If we do have a space industry, and space habitats, and easy commercial space travel, and EVAs etc Earth's gravity well will still be a big cost, whereas an asteroid will be just a time delay. If we don't descend into barbarism, maybe more of the earth will be as Bezos says, protected against exploitation, whereas asteroids will be ripe for obliteration. And if the iron is to be used in space, it won't need to be pulled out of a gravity well.
Platinum group metals are often discussed. Iridium, for instance, sells for about $32,000/kg. There's a lot of room for that price to come down and still be profitable with even present-day launch costs, much less with an RLV-enabled launch cost under $2,000/kg.
Quote from: Nibb31 on 04/10/2018 10:06 pmQuote from: groundbound on 04/10/2018 09:30 pmWhy would any nation-state ever fund a science mission of any sort at all? Oh that's right, it happens all the time.As I said, they do it for many reasons, including to offer highly qualified domestic job opportunities, to maintain and develop domestic technological capabilities, to subsidize domestic research and development, and for international soft power credibility. None of those goals are served by purchasing a ride from SpaceX or any other foreign supplier.Sure they are. The ride is not the mission, and the mission is not the ride. They CAN get all of the above by building in-space technology and asking SpaceX to launch it. Whether they realize that and chose to do so is another matter.