81–90 of 414 posts
Perfect. I think it just needs explanation of Karman line. Why is it 100km. What is the meaning?
Kármán said that it's about this height where the aerodynamic lift and inertia being dominant are reversed.
Perfect. I think it just needs explanation of Karman line. Why is it 100km. What is the meaning?
Earlier quoted context omitted.
While a space elevator doesn't contradict any fundamental limits of physics, that doesn't mean it's actually possible to build one. There is no reason to be certain that it's actually possible to create a material that has the required characteristics in terms of tensile strength to support it's own weight, plus the weight of the elevator, plus the weight of all the additional cabling. It also has to endure the huge…
The issue of the line falling back to earth is solved by putting the base of the elevator on water. If the top part of the elevator was cut of you could even detonate charges along the line to make sure all pieces fall into water.
Earlier quoted context omitted.
Probably no easy task. Snipping off just the first few kilometers is not catastrophically destructive yet, and cutting it down further up would require multistage rocket designs, sophisticated steering/targeting and potentially significant yield (you'd need to cut unobtainium, after all...). If you can build a space elevator, you can defend against those. You better thoroughly inspect what cargo you put on the elevat…
Only if the material is way over provisioned. In general, the higher the intrinsic structural load is on a material, the easier it will be to destroy. So, to defend from these attacks, you not only need a cable that can support its own weight, plus the weight of the desired payload, plus some small-is extra tolerance. Instead, you probably need a cable that can support, say, twice its own weight plus four-five times…
TIL it's estimated that over 48 tons of meteors hit the atmosphere every day. Regarding actual space elevators though, while they're not sci-fi to the extent of something like FTL travel - ie. they're technically not physically impossible - they're still pretty firmly in the realm of sci-fi. We don't have anything close to a cable that could sustain its own weight, let alone that of whatever is being elevated. Plus,…
This was incredible! Couldn't stop scrolling and reading. For a kid of a certain age and curiosity it'll blow their mind! I'm so grateful the creator made this, shame that his "buy me a coffee" isn't a simple PayPal or Apple Pay but you have to put in credit card or bank details!!
PayPal and Apple pay take a significant cut of the transaction. CC is a lot less and bank is mostly free of TX fees. Most users don't know/don't care, so given the option, they will likely take it and funnel their donations to conglomerates.
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A terrorist attack on a space elevator happens to figure in the first episode of the TV series Foundation. https://foundation.fandom.com/wiki/Bombing_of_the_Star_Bridg... It’s about as devastating as you would expect.
That's odd. The first episode was the only one I watched and I don't remember that bit. It might have grabbed me. A terrorist attack on a space elevator is a pivotal plot point in Blue Mars by Kim Stanley Robinson, which IMHO is a better work in basically every way than Asimov's magnum opus.
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PayPal and Apple pay take a significant cut of the transaction. CC is a lot less and bank is mostly free of TX fees. Most users don't know/don't care, so given the option, they will likely take it and funnel their donations to conglomerates.
I don't like to input Cc details into random sites whose main business is processing said transactions.
I believe there are other services that will also give you virtual cards, I'm not familiar with them off hand.
Earlier quoted context omitted.
While a space elevator doesn't contradict any fundamental limits of physics, that doesn't mean it's actually possible to build one. There is no reason to be certain that it's actually possible to create a material that has the required characteristics in terms of tensile strength to support it's own weight, plus the weight of the elevator, plus the weight of all the additional cabling. It also has to endure the huge…
The issue of the line falling back to earth is solved by putting the base of the elevator on water. If the top part of the elevator was cut of you could even detonate charges along the line to make sure all pieces fall into water.