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Could aliens ever visit Earth?
Yes. My objection was to the “simply” as it glosses over the details, which is my main objection in these discussions.
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Does some numerology intersect with standard mathematics?
Moderator NoteI think it’s pretty clear that what the OP means by numerology is not the accepted description/definition of numerology. There’s no way to have a conversation in good faith when we don’t have a common language, and this is exacerbated when there is no effort made to correct the misuse of the terminology.
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Could aliens ever visit Earth?
They “shipped” 92 antiprotons, and it wasn’t exactly simple https://www.smithsonianmag.com/smart-news/in-a-first-the-worlds-most-expensive-and-volatile-substance-antimatter-traveled-by-truck-180988431/ It was a trip around the site, too. Nothing was shipped to another lab. The current apparatus – which includes a superconducting magnet, liquid helium cryogenic cooling, power reserves and a vacuum chamber that traps the antiparticles using magnetic and electric fields – weighs 1000 kilograms: much more compact than BASE or any other existing system used to study antimatter. “To reach our first destination – our dedicated precision laboratory at HHU in Germany – would take us at least 8 hours,” says Christian Smorra. “This means we’d have to keep the trap’s superconducting magnet at a temperature below 8.2 K for that long. So, in addition to the liquid helium , we’d need to have a generator to power a cryocooler on the truck. We are currently investigating this possibility.” https://home.cern/base-experiment-cern-succeeds-transporting-antimatter/
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Could aliens ever visit Earth?
Assuming you have a bunch of antimatter, because getting and keeping a bunch of antimatter is simple. Because we don’t notice the alleged aliens sticking around. The analysis doesn’t address this type of scenario. You’re free to start a thread that discusses scenarios that differ from the described one
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Could aliens ever visit Earth?
The analysis was a response to the release of UFO/UAP reports by the US government, so the visits have to be something that would be reported as such. I think arrive, with the ability to maneuver and leave is implied. Something that would look like a regular meteor strike would not qualify, regardless of whether the occupant was sentient.
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Could aliens ever visit Earth?
OK. You still have to get the rock up to whatever speed is necessary, but we know lower speeds are possible. If the rock is too big, the impact at the destination is going to be catastrophic, but that’s also going to depend on the gravity and atmosphere. Plus you’re describing an unguided payload, so this is not responsible for any of the sightings that prompted the analysis.
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Could aliens ever visit Earth?
There’s nothing in the discussion of the analysis that covers this. It’s about how much fuel you need to get to the cruising speed and slow down again, and how the problem is that as you add fuel, you require even more fuel to accelerate it. Any maneuvering of the craft suffers from this problem. Ignoring it doesn’t make it go away. Even for short-range rockets, going relatively slowly, the vast majority of the rocket’s mass is fuel, the container, and the engines The analysis stands regardless of which scenario you apply it to, though a live human going to another system would likely require an even higher speed Doesn’t change the analysis that was given. It means you could re-evaluate based on a lower speed, but the underlying problems still have to be addressed. Photons have a spectacularly small momentum relative to their energy, and 1/r^2 is a big problem. Near earth it’s about 4.5 micronewtons per square meter
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Could aliens ever visit Earth?
How do these spores or seeds reach cruising speed, and slow down when they reach their destination? Surviving the vacuum and cold and radiation in space, and then not burning up in the atmosphere when you hit it at high speed. Robotic craft does not solve the propulsion issues raised in the article. This is the issue of the physics of visiting planets I mentioned. You have to slow down and speed up again to land on a planet or asteroid and then leave, so all you’ve done is amplify the problem that hasn’t been solved. Right. One needs to distinguish between engineering solutions and hard physics limits. The speed of light is a hard limit, as is the requirement for expelling mass for propulsion (unless you use photons, but that carries its own severe limitations) Having to accelerate all of the fuel you take with you is a hard physics limit; you can do analysis without worrying about the specific way you engineer the product.
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Could aliens ever visit Earth?
We have the occasional thread on alleged aliens but nobody ever seems willing to tackle the physics and engineering discussion of how they got here This discusses various methods of propulsion, assuming a cruising speed of 0.1c https://theconversation.com/could-aliens-ever-visit-earth-an-aerospace-scientist-unpacks-the-challenges-of-interstellar-spaceflight-280657 “Consequently, using chemical propulsion on a spacecraft with a cruise velocity of 19,000 miles per second (30,000 km/s) would require more fuel than all the mass in the observable universe” Of course you could go slower but that amplifies some other issues raised, like how equipment breaks down over time. It’d be interesting to see an analysis of what the maximum cruising speed is with chemical rockets, for a reasonable fuel load. It doesn’t investigate other problems you’d encounter that relate to biology, nor does it investigate the problems of visiting planets if you somehow got to a destination.
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swansont started following Could aliens ever visit Earth?
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I could not reach Scienceforums for 3 days
It does seem a tad laggy for me, too, but by that I mean it took 30 seconds to load instead of 10. And the page is https, so whatever the problem might be, it’s not universal. I’m not an admin, so I don’t know if anything is going on; we’re usually warned when there’s scheduled maintenance/upgrades, and I’ve seen no such announcement.
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Does some numerology intersect with standard mathematics?
No, not really. TheVat (not me; you messed up the attribution) said apophenia. Faces don’t have a pattern? I think one big problem here is that you’re imagining definitions for words that aren’t the actual definitions. Makes it hard to communicate properly There are patterns in sewing, too. Having a keyword show up in two descriptions doesn’t mean there’s any kind of equivalence.
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Does some numerology intersect with standard mathematics?
And citing them as support is likely confirmation bias https://en.wikipedia.org/wiki/Confirmation_bias
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Does some numerology intersect with standard mathematics?
I think there’s disagreement that there’s a “pattern part” of numerology. Numerology doesn’t assign numbers based on some observed pattern or objective metric. So don’t jump past this as if it’s been accepted as given. If you start with the physically impossible, just about any conclusion is possible, but the motivation has no bearing on the validity of the practice. It objectively is not. You don’t get to just make up your own definitions for words
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Does some numerology intersect with standard mathematics?
In Pythagorean. Using Chaldean, it’s 9
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World’s largest sand battery passes test
If the goal is heating, why add the inefficiency of creating steam to make electricity?