> is there some sort of gravitational body in the middle that makes everything orbit in galaxies? No. The Sun's orbit is determined by the total mass of stars, gas, and dark matter interior to the orbit. This is mostly…
"Keplerian" is a term of art based on the rotation curve in Newtonian gravity when all the mass of a system is concentrated at its center. For the Solar System, the rotation curve outside the radius of the Sun is pretty…
You don't need a simulation; you just need an understanding of Newtonian gravity, basic algebra and a bit of calculus, and some knowledge of stellar masses, velocities, and space densities. This is a standard part of…
The problem isn't so much the flatness of the rotation curve, but its continued high value: as you go farther and farther out in distance, it should drop rapidly because most of the visible matter is concentrated toward…
I think "if the training pool is large enough" is a real issue here. We're not talking about living languages with large, properly attested and annotated corpuses. Indeed, one of the thing you'd probably like the…
It sounds like they were excavated in 1881-1882 (e.g., https://en.wikipedia.org/wiki/Sippar#Archaeology) by Hormuzd Rassam ("widely believed to be the first-known Middle Eastern and Assyrian archaeologist from the…
> there could be empty regions of space in which billions of years more have elapsed than in e.g. a galaxy. A problem with that idea would be that the ages of galaxies in low-density regions (including voids) tend to be…
> There have been a longstanding problem that the history of the universe and cosmological distance scale haven't made sense. https://medium.com/starts-with-a-bang/the-hubble-tension-sti... > When I was getting my PhD…
I like how the arXiv sub-category this paper is in is "Soft Condensed Matter". Because of course it is. (Also, the Acknowledgments ends with "We further thank [list of names] for their support and for eating up the…
I'll admit I've never seen "track" used to mean "write" before.
> * I'd like to move the cursor backwards and forwards in long commands easier, maybe even with the mouse (!). Use case is, say, a long curl command and I press up-arrow to repeat it, but want to tweak something. So I…
From Chapter VII of Thomas Kuhn, The Structure of Scientific Revolutions (https://www.lri.fr/~mbl/Stanford/CS477/papers/Kuhn-SSR-2ndEd...): "If awareness of anomaly plays a role in the emergence of new sorts of…
Physics has obviously had Kuhnian revolutions since Newton, the emergence of relativity and quantum mechanics being two obvious examples.
Those would be "captive" ferrets, not "domesticated" ones. (They want to introduce the offspring from the breeding program into the wild, and have in fact done this for about 10,000 offspring.) This article in Science…
From the linked Washington Post story: "The cloned animals were made by injecting one of Willa’s cells into an egg from a domesticated ferret." Which is kind of interesting, because domesticated ferrets are a different…
The article says that it was no longer functional (in its communications abilities, at least) by that point > Launched in 1969 ... the spacecraft ceased working a few years later ... Also, what makes you think the US…
The Tines in Vernor Vinge's A Fire Upon the Deep are pretty good example. (The aliens in A Deepness in the Sky are physically alien, but psychologically pretty close to humans.)
Amusingly, I have made three tries to read that book, and kept giving up (getting a little further each time). Partly it was the peculiar sense of aesthetics (e.g., the idea that of course audience would reject color…
Do you recall the name of the good translator?
C.J. Cherryh's 1981 novel Wave Without a Shore has something vaguely similar, where the human inhabitants of a planet refuse to notice the non-human natives sharing their cities.
I remember reading this, and looking out my office window where the branches of neighboring tree (denuded of leaves because it was winter) made three or four near-perfect right angles in projection (along with…
Ah, OK, thanks for the link.
> They arrayed three antennas together. No, they didn’t. The three antennas are in California, Spain, an Australia; they can’t all point at the same point in the sky at once, and even if two could do so, they’re not…
That's not even remotely correct. Just today I heard a talk about people looking at stellar motions in ultra faint dwarf galaxies, because standard dark-model theories predict they should have centrally cusped…
Nemo was indeed originally written as a former Polish rebel against Russian rule, but Verne's publisher objected on the grounds that this might offend Russians[1], and so the published version of Twenty Thousand Leagues…
> is there some sort of gravitational body in the middle that makes everything orbit in galaxies? No. The Sun's orbit is determined by the total mass of stars, gas, and dark matter interior to the orbit. This is mostly…
"Keplerian" is a term of art based on the rotation curve in Newtonian gravity when all the mass of a system is concentrated at its center. For the Solar System, the rotation curve outside the radius of the Sun is pretty…
You don't need a simulation; you just need an understanding of Newtonian gravity, basic algebra and a bit of calculus, and some knowledge of stellar masses, velocities, and space densities. This is a standard part of…
The problem isn't so much the flatness of the rotation curve, but its continued high value: as you go farther and farther out in distance, it should drop rapidly because most of the visible matter is concentrated toward…
I think "if the training pool is large enough" is a real issue here. We're not talking about living languages with large, properly attested and annotated corpuses. Indeed, one of the thing you'd probably like the…
It sounds like they were excavated in 1881-1882 (e.g., https://en.wikipedia.org/wiki/Sippar#Archaeology) by Hormuzd Rassam ("widely believed to be the first-known Middle Eastern and Assyrian archaeologist from the…
> there could be empty regions of space in which billions of years more have elapsed than in e.g. a galaxy. A problem with that idea would be that the ages of galaxies in low-density regions (including voids) tend to be…
> There have been a longstanding problem that the history of the universe and cosmological distance scale haven't made sense. https://medium.com/starts-with-a-bang/the-hubble-tension-sti... > When I was getting my PhD…
I like how the arXiv sub-category this paper is in is "Soft Condensed Matter". Because of course it is. (Also, the Acknowledgments ends with "We further thank [list of names] for their support and for eating up the…
I'll admit I've never seen "track" used to mean "write" before.
> * I'd like to move the cursor backwards and forwards in long commands easier, maybe even with the mouse (!). Use case is, say, a long curl command and I press up-arrow to repeat it, but want to tweak something. So I…
From Chapter VII of Thomas Kuhn, The Structure of Scientific Revolutions (https://www.lri.fr/~mbl/Stanford/CS477/papers/Kuhn-SSR-2ndEd...): "If awareness of anomaly plays a role in the emergence of new sorts of…
Physics has obviously had Kuhnian revolutions since Newton, the emergence of relativity and quantum mechanics being two obvious examples.
Those would be "captive" ferrets, not "domesticated" ones. (They want to introduce the offspring from the breeding program into the wild, and have in fact done this for about 10,000 offspring.) This article in Science…
From the linked Washington Post story: "The cloned animals were made by injecting one of Willa’s cells into an egg from a domesticated ferret." Which is kind of interesting, because domesticated ferrets are a different…
The article says that it was no longer functional (in its communications abilities, at least) by that point > Launched in 1969 ... the spacecraft ceased working a few years later ... Also, what makes you think the US…
The Tines in Vernor Vinge's A Fire Upon the Deep are pretty good example. (The aliens in A Deepness in the Sky are physically alien, but psychologically pretty close to humans.)
Amusingly, I have made three tries to read that book, and kept giving up (getting a little further each time). Partly it was the peculiar sense of aesthetics (e.g., the idea that of course audience would reject color…
Do you recall the name of the good translator?
C.J. Cherryh's 1981 novel Wave Without a Shore has something vaguely similar, where the human inhabitants of a planet refuse to notice the non-human natives sharing their cities.
I remember reading this, and looking out my office window where the branches of neighboring tree (denuded of leaves because it was winter) made three or four near-perfect right angles in projection (along with…
Ah, OK, thanks for the link.
> They arrayed three antennas together. No, they didn’t. The three antennas are in California, Spain, an Australia; they can’t all point at the same point in the sky at once, and even if two could do so, they’re not…
That's not even remotely correct. Just today I heard a talk about people looking at stellar motions in ultra faint dwarf galaxies, because standard dark-model theories predict they should have centrally cusped…
Nemo was indeed originally written as a former Polish rebel against Russian rule, but Verne's publisher objected on the grounds that this might offend Russians[1], and so the published version of Twenty Thousand Leagues…