Tynnanseldom correct, never unsureRegistered Userregular
Oh I see the response was about naked eye visibility, which, nah. Not really relevant once you get that close.
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StraightziHere we may reign secure, and in my choice,To reign is worth ambition though in HellRegistered Userregular
That does have me thinking about all of those pictures where the dinosaurs are looking up at the meteor that's hurtling towards them. All of those pictures were taken in that one second window.
I was reading a sci fi series recently that has a lot of very well done evocative planetary impact catastrophe stuff in it and man it gave me crazy vivid dreams for a while, like what a surreal nightmare
I was reading a sci fi series recently that has a lot of very well done evocative planetary impact catastrophe stuff in it and man it gave me crazy vivid dreams for a while, like what a surreal nightmare
There was a good bit about this in, I wanna say, green mars, but it might have been in red mars instead
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Tynnanseldom correct, never unsureRegistered Userregular
Which one had the space elevator crash? That was pretty nuts to read.
Which one had the space elevator crash? That was pretty nuts to read.
This happens in Red Mars. It might also happen in later books, I have not read them, but the Phobos elevator fucking up the planet happens in Red Mars.
Lets talk about how silly space elevators are compared to Skyhooks
The theory is that the top of the skyhook's elevator is in low earth orbit the bottom about roughly at the top of the stratosphere
So you can deliver cargo to the bottom of the skyhook have it take the elevator to the top where another craft takes it to where it needs to go
In general it's a lot cheaper to set up and maintain than a space elevator
Assuming those fuel-less engine things that were all the rage a few years ago actually provide thrust, you could just use those and power it with solar probably.
not a doctor, not a lawyer, examples I use may not be fully researched so don't take out of context plz, don't @ me
Assuming those fuel-less engine things that were all the rage a few years ago actually provide thrust, you could just use those and power it with solar probably.
If it dips so low it's in atmosphere it could just collect it and push it out at much higher velocity for reaction mass. It'd be a tiny amount of thrust but near constant.
The most recent story I saw about the EM drive tests suggest the apparent thrust measurements were universally just interactions with Earth's electromagnetic field leaking through the magnetic field isolation around the test chamber causing false positives. Don't hold your breath about that one.
Wouldn't it'd need occasional corrections; as I think each "launch" would steal some of the skyhook's velocity, either orbital or rotational.
Not that a space elevator wouldn't need some orbit correction movements (at the center of mass) occasionally.
Probably, but it we put the industrial oomph up there to build something like that the course corrections would be trivial by comparison.
Done properly a space elevator would be pretty static. They're a counterweighted tether made taut by the Earth's rotation more than some kind of tower or other solid structure.
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BrodyThe WatchThe First ShoreRegistered Userregular
The most recent story I saw about the EM drive tests suggest the apparent thrust measurements were universally just interactions with Earth's electromagnetic field leaking through the magnetic field isolation around the test chamber causing false positives. Don't hold your breath about that one.
It'd probably still be close enough to Earth to push against the magnetic field in a way to generate lift.
"I will write your name in the ruin of them. I will paint you across history in the color of their blood."
The most recent story I saw about the EM drive tests suggest the apparent thrust measurements were universally just interactions with Earth's electromagnetic field leaking through the magnetic field isolation around the test chamber causing false positives. Don't hold your breath about that one.
It'd probably still be close enough to Earth to push against the magnetic field in a way to generate lift.
So if that's the case you can throw the whole stupid EM drive itself in the garbage can and build electromagnets instead, but I have no idea if that would even be a useful method of generating thrust in near-Earth space. Electromagnetism is weird and mysterious to me but not to science in general, so there's probably some reason they don't already do this.
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PiptheFairFrequently not in boats.Registered Userregular
this is a couple years old, but this dude is one of the leading figures in challenging the previously held notions that the sea peoples caused the late bronze age decline
instead he posits that they were a migratory and semi-aggresive result of a collection of regional climate and geological catastrophes
Oh man, I am all about the late bronze age collapse thing, many thanks
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PiptheFairFrequently not in boats.Registered Userregular
also "the Tjekker and Peleset were made ashes." is a fucking strong turn of phrase
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MayabirdPecking at the keyboardRegistered Userregular
It's a little dry but if you don't mind that I recommend his book 1177 BC: The Year Civilization Collapsed where he goes into the Bronze Age civilizations and their collapse in more detail. For instance, how some areas of collapse that were blamed on the Sea Peoples really look more like local revolts against the political structure of the time (palaces and temples were burned to the ground and abandoned, and those were excavated first, but later excavations showed the surrounding towns were just fine during that time and kept on keeping on for decades after).
"When your messenger arrived, the army was . . . humiliated and the city was sacked. Our food in the threshing floors was burnt and the vineyards were also destroyed. Our city is sacked. May you know it. May you know it!"
Well, the correspondence quoted in that lecture sure does do the "accounts of the ongoing apocalypse" thing...
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PiptheFairFrequently not in boats.Registered Userregular
I believe this would predate Neolithic agriculture.
If someone told me bread would be the driving force behind the cultivation of wheat and subsequently everything we have now, I'd believe them. Bread is amazing.
I was reading that back in the day people used to make beer out of all sorts of wacky and/or poisonous stuff, like henbane beer, I wonder what a henbane brew is like
Assuming those fuel-less engine things that were all the rage a few years ago actually provide thrust, you could just use those and power it with solar probably.
I know NASA is working on automated spacecraft refuelling technology, as well.
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BrodyThe WatchThe First ShoreRegistered Userregular
I was reading that back in the day people used to make beer out of all sorts of wacky and/or poisonous stuff, like henbane beer, I wonder what a henbane brew is like
Wicked.
"I will write your name in the ruin of them. I will paint you across history in the color of their blood."
I have a question for those of y'all that know more about physics than I do. While playing with a fidget spinner at work I noticed that while it's spinning it sort of, I dunno, resists when I move it? Like if I'm holding it horizontally while it's spinning and I try to rotate my hand so that it's spinning vertically it feels like it's resisting. Does anyone know what I'm talking about? Why does it do that? Does the phenomenon have a name?
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There was a good bit about this in, I wanna say, green mars, but it might have been in red mars instead
This happens in Red Mars. It might also happen in later books, I have not read them, but the Phobos elevator fucking up the planet happens in Red Mars.
(Which is a little annoying because it's created a whole lot of kneejerk fear of the concept.)
The theory is that the top of the skyhook's elevator is in low earth orbit the bottom about roughly at the top of the stratosphere
So you can deliver cargo to the bottom of the skyhook have it take the elevator to the top where another craft takes it to where it needs to go
In general it's a lot cheaper to set up and maintain than a space elevator
Still not as efficient as a space elevator but if it were low enough it might be worth it.
So like a normal carnival ride scaled up I guess.
One theory is to have it non rotating
The other is how it would roll along
The problem is we can kind of build a skyhook now but it's on the horizon tech wise
Vorbit
But would it be built of gold or brass
Neither
Atomic Oxygen is not your friend
Wouldn't it'd need occasional corrections; as I think each "launch" would steal some of the skyhook's velocity, either orbital or rotational.
Not that a space elevator wouldn't need some orbit correction movements (at the center of mass) occasionally.
If it dips so low it's in atmosphere it could just collect it and push it out at much higher velocity for reaction mass. It'd be a tiny amount of thrust but near constant.
Probably, but it we put the industrial oomph up there to build something like that the course corrections would be trivial by comparison.
Done properly a space elevator would be pretty static. They're a counterweighted tether made taut by the Earth's rotation more than some kind of tower or other solid structure.
It'd probably still be close enough to Earth to push against the magnetic field in a way to generate lift.
The Monster Baru Cormorant - Seth Dickinson
Steam: Korvalain
The thrust detected probably wasn't actually from the EM drive, it was likely electromagnetic forces interacting between the Earth's field and the field generated by the power running through the cables powering the EM drive. Here's the study: https://www.researchgate.net/publication/325177082_The_SpaceDrive_Project_-_First_Results_on_EMDrive_and_Mach-Effect_Thrusters
So if that's the case you can throw the whole stupid EM drive itself in the garbage can and build electromagnets instead, but I have no idea if that would even be a useful method of generating thrust in near-Earth space. Electromagnetism is weird and mysterious to me but not to science in general, so there's probably some reason they don't already do this.
this is a couple years old, but this dude is one of the leading figures in challenging the previously held notions that the sea peoples caused the late bronze age decline
instead he posits that they were a migratory and semi-aggresive result of a collection of regional climate and geological catastrophes
Well, the correspondence quoted in that lecture sure does do the "accounts of the ongoing apocalypse" thing...
old-ass bread
nonono, that would be old ass-bread
the hyphen is very important
If someone told me bread would be the driving force behind the cultivation of wheat and subsequently everything we have now, I'd believe them. Bread is amazing.
It was for most people back then as well
I know NASA is working on automated spacecraft refuelling technology, as well.
Wicked.
The Monster Baru Cormorant - Seth Dickinson
Steam: Korvalain
New moons!
It is know as the Jovian sub system