字幕表 動画を再生する 英語字幕をプリント If you had to buy a new car every time you had to go somewhere, you'd be broke by Tuesday. So, why not apply the same logic to space travel. 90s kids will remember the space shuttle launches that ferried astronauts and cargo to the ISS. But even the reusable shuttle was expensive, and so the program ended in 2011. According to the founder of SpaceX, Elon Musk, the shuttle was too complex, and money could be saved if the rocket was simplified. Simplifying a rocket. How hard could that be? Well, after few crash landings and explosions, SpaceX seems to have the self-landing reusable rocket thing figured out. So, does this make space travel cheaper? Space shuttle missions cost about 450 million dollars per launch, and while that sounds like a lot more than SpaceX's price of $133 million, you have to remember the Space Shuttle was a beast of a craft, capable of carrying 50,000 pounds of cargo AND 7 crew members. Broken down by the pound Shuttle flights cost about 10,000 dollars whereas a SpaceX Dragon stuffed to the gills costs 9,100 dollars for every pound of cargo. That's well shy of Musk's ultimate goal of bringing down the cost of space travel by a at least a factor of 10. But, he hopes to hit those numbers by launching more cargo at once on their next rocket, the Falcon Heavy. For now SpaceX has started launching reused Falcon-9 rockets and says the cost of refurbishing one is less than half of building one from scratch. They still have to recoup their investment, but eventually Musk says prices will drop. The thing is, SpaceX is competing for government contracts with another company called United Launch Alliance or ULA, a joint venture of Lockheed-Martin and Boeing. Based on the US Air Force's 2018 budget estimate, it looks like ULA will charge 422 million dollars per launch in 2020. SpaceX, on the other hand, has done similar jobs for only 83 million dollars. So things are allegedly cheaper. Though, how much of that 300 million dollars difference is down to the rocket, is up for debate. In fact, the Government Accountability Office has criticized ULA for a lack of transparency on pricing. While some would argue ULA charges that much because they're up against the margin and can't cut costs, Musk thinks they charge that much because they can. They used to have no competition, their launch record is outstanding, and the satellites they're launching cost billions, so what's a few hundred million dollars between friends? While the Department of Defense can accept the higher launch costs because their budget is bigger than God's, NASA is, by comparison, a poor pauper that has to make a lump of coal last the winter. In 2015 NASA received 34 times less money than the DOD. So, if SpaceX can save NASA money, it would be an ideal partnership. The next thing NASA needs is a way to transport people. SpaceX's unfinished Dragon 2 spacecraft is designed to carry people at a price of 58 million dollars per seat. Pretty good considering the only other ride to the ISS is aboard a Russian Soyuz, and since the shuttle's retirement they've been hiking the price. They're planning to charge 81 million dollars a seat next year. I for one hope he does manage to get that price down, because I don't think I can save up 58 million dollars before I die. Maybe I should invent some sort of service. Like an easy way to pay my pals or something. I don't know, get back to me on this one, Elon. Thanks for watching, if you like what you see may I casually direct you to the subscribe button. If you bought a ticket to space, how high would you have to go before you technically got there? Trace tells you where space starts here. So would you hitch a ride on a rocket if you could? Let us know in the comments, and thanks for watching
B1 中級 米 SpaceXsの再利用可能なロケットは実際に宇宙旅行を安くするのか? (Do SpaceXs Reusable Rockets Actually Make Space Travel Cheaper?) 102 7 哲維范 に公開 2021 年 01 月 14 日 シェア シェア 保存 報告 動画の中の単語