正在加载视频...

视频加载失败

Astranis CEO John Gedmark calls space elevators the ultimate civilizational flex: if aliens come and find us and we don't have our space elevator up and running yet, that's embarrassing "I like space elevators. This is the idea that originally came from Arthur C. Clarke, who also was the...

18,476 次观看 • 1 天前 •via X (Twitter)

0 条评论

暂无评论

原始帖子的评论将显示在这里

相关视频

Elon Musk in 2008: "NASA was going to pay Russia $70M per astronaut. SpaceX could do it for $15M" Musk is presenting SpaceX to a small audience. He shows a video of the Falcon 9 first stage firing: "This is almost a million pounds of thrust in vacuum, about four times the maximum thrust of a 747. It's pretty much Armageddon down there. You don't want to be standing at the base of that test stand." He explains the NASA contract: "The contract SpaceX has right now is to demonstrate cargo transfer to the space station and return of experiments to Earth. What we're hoping NASA will exercise is an option on that contract to also carry astronauts. I think they will exercise that option fairly soon." On the coming gap in American spaceflight: "The Space Shuttle is retiring in 2010. So unless our spacecraft is active, the US will not have the ability to send people to orbit. For about five or six years, unless SpaceX is successful, there will be no American manned space capability. There'll just be the Russians." He describes the situation bluntly: "The Russians are charging us over $70 million per seat after the shuttle retires. They got us over a barrel and they're doing us hard. We'll spend half a billion dollars per year on the Russians just buying tickets for six or seven astronauts to go to the space station." Musk shares SpaceX's cost: "Our cost per person, even assuming no reusability, assuming every bit of it is expended and no refurbishment, is about $15 million per person. And it's us. The jobs are here. So I think it's kind of a no-brainer. But no-brainers in Washington DC don't always happen." On Congress: "We've been given money for the cargo portion but not for the manned portion. The amount we're asking for to get this done is $300 million. For every year that we're dependent on the Russians, we have to send them half a billion dollars. It seems kind of ludicrous. But anyway, that's DC." Someone asks about the space elevator: "The idea is you have this really long cable, like 40 to 60,000 miles long, with the ends way out in space and the base on Earth. There are a lot of issues with the space elevator. It relies on super strong materials, carbon nanotubes. Until we build, say, a carbon nanotube footbridge, then I think we should not really be thinking too much about building a 60,000-mile elevator. Not this century." On space solar power: "If there's anyone in the world who should love space solar power, it's me. I'm chairman and the largest shareholder of a solar company called SolarCity, and I've got a rocket company. So it should be perfect. Unfortunately, I don't think space solar power makes sense. I wish it did because that'd be awesome. But even if you assume it costs zero to transport the solar panels to space, when you take into account the equipment to convert the energy to microwaves, then equipment on the ground to convert it back to electricity, just that capital cost blows you out of the water. It's not competitive with terrestrial solar power. So there's no point in even thinking about it." On fuel costs: "The fuel and oxidizer cost is really super low. For our big rocket, it's only a couple hundred thousand dollars. For our small rocket, it's about $30,000 or $40,000. If you just look at the propellant cost, it's very, very cheap." On the long-term goal: "One of the design goals for Falcon 9 is that it can go from in the hangar to in the air in under 60 minutes, which would be super fast for a rocket, particularly a big rocket. It's going to take several flights before we get there. But as long as we lay the foundation and make sure the design is capable of that, we can at least have the possibility of getting to a flight an hour in the future."

Grey

56,512 次观看 • 3 个月前

Elon Musk reveals why he believes the cheapest place to put AI will be space within 36 months "The availability of energy is the issue. Everywhere outside of China, electrical output is more or less flat. The output of chips is growing exponentially, but the output of electricity is flat" "How are you going to turn the chips on? Magical power sources? Magical electricity fairies?" "Space is really a regulatory play. It's harder to build on land than it is in space. It's harder to scale on the ground than it is to scale in space" "It's always sunny in space. You don't have a day-night cycle, seasonality, clouds, or an atmosphere. The atmosphere alone results in about a 30% loss of energy" "Any given solar panel can do about five times more power in space than on the ground. You also avoid the cost of having batteries to carry you through the night" "My prediction is that it will be by far the cheapest place to put AI. It will be space in 36 months or less. Maybe 30 months" "The only place you can really scale is space. Once you start thinking in terms of what percentage of the Sun's power you are harnessing, you realize you have to go to space" "Solar cells are already farcically cheap. In China they're around 25-30 cents a watt. Now put them in space, and it's not five times cheaper, it's 10 times cheaper because you don't need any batteries" "The moment your cost of access to space becomes low, by far the cheapest and most scalable way to generate tokens is space. It's not even close" "Those who have lived in software land don't realize they're about to have a hard lesson in hardware. It's actually very difficult to build power plants"

Jaynit

8,361,022 次观看 • 2 个月前