Quote from: Robotbeat on 02/17/2023 09:52 pmQuote from: Tywin on 02/17/2023 08:41 pmOr Berger is not objective...Pray tell, what exactly do you mean by that?That he lets his biases influence his reporting[1]. And in particular he has a pro SpaceX bias. I think any fairly dispassionate[2] observer would agree with that assessment. But so what? It doesn't matter, facts are facts. (so it doesn't matter if he's biased in this instance)1 - Guess what? We ALL have biases. There is no perfectly[2] dispassionate voice out there. 2 - it's possible to be fairly dispassionate.[3]3 - yes, I reused a footnote.
Quote from: Tywin on 02/17/2023 08:41 pmOr Berger is not objective...Pray tell, what exactly do you mean by that?
Or Berger is not objective...
Quote from: meekGee on 02/17/2023 10:02 pmQuote from: Robotbeat on 02/17/2023 09:40 pmSpace tourism is a real, demonstrated business use case for LEO space stations. There are potentially others (a natural staging point for deep space missions, the nearest low gravity point for assembling very large satellites with people or low-latency telerobotics, etc) but this one has been proven.If it’s enough… well that depends on how cheap you can get it. If you can get the costs down to, say, $500 million per year or lower, then it’s possible IMHO.NASA shouldn’t invest in it for its own purposes unless it can do so for very cheap. Ideally, NASA would be the minority of revenue and that ought to be the mid-term goal of the program.Why does tourism require or even desire a LEO station?A Starship like vehicle can give you all you want, without the need for continuous presence in space with all the cost that it entails. It can go to any orbit or around the moon, and is plenty spacious enough.All the servicing that goes around human presence can be done at port instead of in orbit, which is so much cheaper. You take everything you need with you for the trip, and after you land you refresh the galley, empty the tanks, vacuum the rugs, and go again.Starships are more like cruise ships, since Space is more like the oceans. It's the trip that's the destination.--It's a positive move by BO. And in the very very long run, as stated upthread, the road to crazy large in-space habitats goes through the moon or asteroids anyway.Let’s say you want a station-like experience on Starship. Easy, because its volume is so huge. BUT only huge if you have few people, like the 12 people SpaceX currently offers per Starship flight on their website. Let’s say that costs $120 million. That’s $10m per person. But Starship is big enough to fit 480 people for a few hours. If they had a large station in LEO, you could launch 480 people at a time for the same $120 million (give or take). Then, the per-person launch costs are just $250,000 for the same price per launch. Up to a Factor of 40 reduction in launch costs if you don’t have to relaunch your space station for every trip! (Still need servicing, but I think you understand the value proposition here… you can drastically expand the number of people who could afford to go).Starship is a Jumbo Jet. Sure, you can fit out a Jumbo Jet like a luxury yacht, but it’s ultimately built for mass transit (with sleeper cars if you want a trip all the way to Mars).EDIT: same argument would apply to a large Blue Origin vehicle.
Quote from: Robotbeat on 02/17/2023 09:40 pmSpace tourism is a real, demonstrated business use case for LEO space stations. There are potentially others (a natural staging point for deep space missions, the nearest low gravity point for assembling very large satellites with people or low-latency telerobotics, etc) but this one has been proven.If it’s enough… well that depends on how cheap you can get it. If you can get the costs down to, say, $500 million per year or lower, then it’s possible IMHO.NASA shouldn’t invest in it for its own purposes unless it can do so for very cheap. Ideally, NASA would be the minority of revenue and that ought to be the mid-term goal of the program.Why does tourism require or even desire a LEO station?A Starship like vehicle can give you all you want, without the need for continuous presence in space with all the cost that it entails. It can go to any orbit or around the moon, and is plenty spacious enough.All the servicing that goes around human presence can be done at port instead of in orbit, which is so much cheaper. You take everything you need with you for the trip, and after you land you refresh the galley, empty the tanks, vacuum the rugs, and go again.Starships are more like cruise ships, since Space is more like the oceans. It's the trip that's the destination.--It's a positive move by BO. And in the very very long run, as stated upthread, the road to crazy large in-space habitats goes through the moon or asteroids anyway.
Space tourism is a real, demonstrated business use case for LEO space stations. There are potentially others (a natural staging point for deep space missions, the nearest low gravity point for assembling very large satellites with people or low-latency telerobotics, etc) but this one has been proven.If it’s enough… well that depends on how cheap you can get it. If you can get the costs down to, say, $500 million per year or lower, then it’s possible IMHO.NASA shouldn’t invest in it for its own purposes unless it can do so for very cheap. Ideally, NASA would be the minority of revenue and that ought to be the mid-term goal of the program.
The most straightforward and obvious model of Jeff’s ideas of space utilization is that Jeff is at heart an O’Neillian. And O’Neil Cylinders are not stationed in LEO, they’re too big. They’re also too big to build with material launched from Earth, which is why the focus on lunar ISRU (although I have my doubts this will be cheaper, that is the logic).Berger is almost certainly correct. I haven’t seen any evidence that Jeff is anything but an O’Neillian, and LEO is not a special place in the O’Neillian approach, other than a transit hub or something.
Space tourism is a real, demonstrated business use case for LEO space stations...
...There are potentially others (a natural staging point for deep space missions, the nearest low gravity point for assembling very large satellites with people or low-latency telerobotics, etc) but this one has been proven.If it’s enough… well that depends on how cheap you can get it. If you can get the costs down to, say, $500 million per year or lower, then it’s possible IMHO.NASA shouldn’t invest in it for its own purposes unless it can do so for very cheap. Ideally, NASA would be the minority of revenue and that ought to be the mid-term goal of the program.
Quote from: Robotbeat on 02/17/2023 10:11 pmQuote from: meekGee on 02/17/2023 10:02 pmQuote from: Robotbeat on 02/17/2023 09:40 pmSpace tourism is a real, demonstrated business use case for LEO space stations. There are potentially others (a natural staging point for deep space missions, the nearest low gravity point for assembling very large satellites with people or low-latency telerobotics, etc) but this one has been proven.If it’s enough… well that depends on how cheap you can get it. If you can get the costs down to, say, $500 million per year or lower, then it’s possible IMHO.NASA shouldn’t invest in it for its own purposes unless it can do so for very cheap. Ideally, NASA would be the minority of revenue and that ought to be the mid-term goal of the program.Why does tourism require or even desire a LEO station?A Starship like vehicle can give you all you want, without the need for continuous presence in space with all the cost that it entails. It can go to any orbit or around the moon, and is plenty spacious enough.All the servicing that goes around human presence can be done at port instead of in orbit, which is so much cheaper. You take everything you need with you for the trip, and after you land you refresh the galley, empty the tanks, vacuum the rugs, and go again.Starships are more like cruise ships, since Space is more like the oceans. It's the trip that's the destination.--It's a positive move by BO. And in the very very long run, as stated upthread, the road to crazy large in-space habitats goes through the moon or asteroids anyway.Let’s say you want a station-like experience on Starship. Easy, because its volume is so huge. BUT only huge if you have few people, like the 12 people SpaceX currently offers per Starship flight on their website. Let’s say that costs $120 million. That’s $10m per person. But Starship is big enough to fit 480 people for a few hours. If they had a large station in LEO, you could launch 480 people at a time for the same $120 million (give or take). Then, the per-person launch costs are just $250,000 for the same price per launch. Up to a Factor of 40 reduction in launch costs if you don’t have to relaunch your space station for every trip! (Still need servicing, but I think you understand the value proposition here… you can drastically expand the number of people who could afford to go).Starship is a Jumbo Jet. Sure, you can fit out a Jumbo Jet like a luxury yacht, but it’s ultimately built for mass transit (with sleeper cars if you want a trip all the way to Mars).EDIT: same argument would apply to a large Blue Origin vehicle.My argument is that the 480 person station station would cost you more than individual Starship cruises.Why? Because the upmass (which is the only thing you'd be saving on) is cheap, but now you'll have to maintain an in-space hotel, including all the life support for example. All the factors that go into making a manned Starship trip more expensive than a cargo launch would multiply because now it's a permanent habitat. For example, for a one week trip Starship would not need a closed life support system. It'll carry oxygen, water and food from earth for basically no cost.And Starships are self-contained and can go anywhere - LEO, HEO, lunar... Can't do that with a station.As per your cruise ship analogy - note that you could also pack the cruise ship like a jet plane and transport 50,000 people to a sea-borne hotel... But you don't. You give each one of them a cabin, and the model works, and again the ship can go to any destination, touch it, and sail right back.
Quote from: meekGee on 02/18/2023 12:24 amQuote from: Robotbeat on 02/17/2023 10:11 pmQuote from: meekGee on 02/17/2023 10:02 pmQuote from: Robotbeat on 02/17/2023 09:40 pmSpace tourism is a real, demonstrated business use case for LEO space stations. There are potentially others (a natural staging point for deep space missions, the nearest low gravity point for assembling very large satellites with people or low-latency telerobotics, etc) but this one has been proven.If it’s enough… well that depends on how cheap you can get it. If you can get the costs down to, say, $500 million per year or lower, then it’s possible IMHO.NASA shouldn’t invest in it for its own purposes unless it can do so for very cheap. Ideally, NASA would be the minority of revenue and that ought to be the mid-term goal of the program.Why does tourism require or even desire a LEO station?A Starship like vehicle can give you all you want, without the need for continuous presence in space with all the cost that it entails. It can go to any orbit or around the moon, and is plenty spacious enough.All the servicing that goes around human presence can be done at port instead of in orbit, which is so much cheaper. You take everything you need with you for the trip, and after you land you refresh the galley, empty the tanks, vacuum the rugs, and go again.Starships are more like cruise ships, since Space is more like the oceans. It's the trip that's the destination.--It's a positive move by BO. And in the very very long run, as stated upthread, the road to crazy large in-space habitats goes through the moon or asteroids anyway.Let’s say you want a station-like experience on Starship. Easy, because its volume is so huge. BUT only huge if you have few people, like the 12 people SpaceX currently offers per Starship flight on their website. Let’s say that costs $120 million. That’s $10m per person. But Starship is big enough to fit 480 people for a few hours. If they had a large station in LEO, you could launch 480 people at a time for the same $120 million (give or take). Then, the per-person launch costs are just $250,000 for the same price per launch. Up to a Factor of 40 reduction in launch costs if you don’t have to relaunch your space station for every trip! (Still need servicing, but I think you understand the value proposition here… you can drastically expand the number of people who could afford to go).Starship is a Jumbo Jet. Sure, you can fit out a Jumbo Jet like a luxury yacht, but it’s ultimately built for mass transit (with sleeper cars if you want a trip all the way to Mars).EDIT: same argument would apply to a large Blue Origin vehicle.My argument is that the 480 person station station would cost you more than individual Starship cruises.Why? Because the upmass (which is the only thing you'd be saving on) is cheap, but now you'll have to maintain an in-space hotel, including all the life support for example. All the factors that go into making a manned Starship trip more expensive than a cargo launch would multiply because now it's a permanent habitat. For example, for a one week trip Starship would not need a closed life support system. It'll carry oxygen, water and food from earth for basically no cost.And Starships are self-contained and can go anywhere - LEO, HEO, lunar... Can't do that with a station.As per your cruise ship analogy - note that you could also pack the cruise ship like a jet plane and transport 50,000 people to a sea-borne hotel... But you don't. You give each one of them a cabin, and the model works, and again the ship can go to any destination, touch it, and sail right back.”upmass is cheap” is a good argument if you’re a billionaire and can afford tens of millions for a ticket, not if you’re only able to afford $250,000…
I think Gravitics, or even larger, is a model that could work. Not small, shuttle-bay-sized modular stations.If we don’t end up putting dozens or even hundreds of passengers on a Starship launch, the cost won’t be much different than Dragon, just roomier. Only the very rich will be able to afford it. That is not using Starship to its full potential.
I'm obviously speculating but I suspect Jeff's reasoning went something like this:1) Blue Origin should be the company that enables millions of people live and work in space.2) Millions of people can live and work in space only if we can build large structures in space.3) To build large structures in space, we need to get the building materials from the Moon.4) To get materials from the Moon, we need transportation systems that can land the necessary ISRU and manufacturing systems.5) To get those transportation systems, we're going to need a lander and a launcher to put the lander in space.6) To build a launcher, we need to start small, so let's build a New Shepard vehicle and use it as a cash cow.Point #5 was the critical error.
I will have to ask my old colleagues who are working on Blue Reef what they think of this.
I think LEO will be the logical place for transit points, where dedicated Earth-to-LEO transportation systems will transport people and cargo to LEO, offload it at the transit point, where it will then transfer to space-only transportation systems going beyond LEO. But that might not be of interest to Jeff Bezos either.
Jeff seems to be floundering around, trying to figure out how to get a piece of the pie without even knowing yet what flavor the pie is. If he ever properly figures it out he would be a major player in HSF but until then I have come to view him as a major distraction. I didn't used to feel that way but his actions and non-actions in the recent past have changed my opinion. It makes me worry about the future of the Vulcan launch vehicle. As much as I like SpaceX, I do NOT want them to be a monopoly. We need ULA and, if he ever gets his act together, Blue Origin.
Quote from: clongton on 02/18/2023 06:18 pmJeff seems to be floundering around, trying to figure out how to get a piece of the pie without even knowing yet what flavor the pie is. If he ever properly figures it out he would be a major player in HSF but until then I have come to view him as a major distraction. I didn't used to feel that way but his actions and non-actions in the recent past have changed my opinion. It makes me worry about the future of the Vulcan launch vehicle. As much as I like SpaceX, I do NOT want them to be a monopoly. We need ULA and, if he ever gets his act together, Blue Origin.Why should we care about the fate of ULA and Blue Origin? Neither exert (nor will exert) much competitive pressure on SpaceX.
Quote from: Coastal Ron on 02/18/2023 01:48 amI think LEO will be the logical place for transit points, where dedicated Earth-to-LEO transportation systems will transport people and cargo to LEO, offload it at the transit point, where it will then transfer to space-only transportation systems going beyond LEO. But that might not be of interest to Jeff Bezos either.For example, designing, building and operating the LEO "airport" would be a great way for BO to gain the necessary experience to properly plan and build an O'Neil cylinder, something that he originally said was his main goal.
Eric Berger's comment sort of confirms my personal crazy idea that the founding purpose of Blue Origin was New Shepard and everything else was handwaving and BS.
But Blue just does not seem all that dedicated to creating a launch system.