Heh! Maybe that is true. You are quoting Asimov who quoted the early Greeks, (Against stupidity, even the gods contend in vain!). It also triggers a mem from sci-fi guy and one-time astrophysicist, Alastair Reynolds, (sort of a spoiler), when a galaxy spanning women (It took over 100K years to go from one system across the Milky Way to another thus, some civilizations had gone extinct, and others flourished solidly. She accidently released a species of semi-smart robots, who had a singular task, and that was till build terrarium like rotational cylinders with flourishing greenery within, across the galaxy. She released these wasp-like robs by accident, and after several billions of years the bots using whatever matter they arrived at, turned the mass cleverly (semi-intelligent) converted it into Terrarium colonies. In doing this accident, she accidently breaks the universe by shifting it's mass around. Am i hopeful that a smart people could do Black Hole mining? Eh, maybe. Here is an oldie from Isaac Arthur on Black Hole Farmers of the far future.
https://www.youtube.com/watch?v=Qam5BkXIEhQ To the Galaxy, and Beyond!Cap'n Zoom. -----Original Message----- From: Lawrence Crowell <goldenfieldquaterni...@gmail.com> To: Everything List <everything-list@googlegroups.com> Sent: Thu, Nov 10, 2022 6:34 am Subject: Re: A sun-like star orbiting a black hole I am having a hard time making sense of what you wrote. I am not that enticed by the idea of hyper-tech ETI in the universe that can control whole stars or black holes. I presume that while they may be better than us, an almost hopelessly inferior form of intelligent life, they still likely have some vulnerability called stupidity. LC On Wednesday, November 9, 2022 at 8:38:56 AM UTC-6 spudb...@aol.com wrote: The issue is that it couldn't be random. Random means that it follows the Poincare equations, and that Einstein's ghost is happy with the gravity, Pierre Laplace buys Al some wine, upstairs, Friedmann smiles and all but a few physicists turning quantum into gravity, sweat the numbers and observations. This would be somebody who has no trouble for the last 50K years making solar power viable, sending off rockets, and has even split the atom, some would dare to think. These would be smart guys setting and harvesting black holes as an industry. Their reactive gravity and such. It's not just a roll of the gravity and mass, dice. So, lets continue observing and let the astronomers do what they do best, watch. Yeah they need a bigger budget to build better scopes and such. -----Original Message----- From: Lawrence Crowell <goldenfield...@gmail.com> To: Everything List <everyth...@googlegroups.com> Sent: Tue, Nov 8, 2022 8:09 pm Subject: Re: A sun-like star orbiting a black hole On Tuesday, November 8, 2022 at 5:27:07 AM UTC-6 johnk...@gmail.com wrote: On Tue, Nov 8, 2022 at 5:42 AM Lawrence Crowell <goldenfield...@gmail.com> wrote: >> But because the sun-like-star and the Black Hole are so much more massive >> than a planet like the earth couldn't you get a very good approximation by >> assuming it's just a 2-body problem? After all, the sun the earth and the >> moon are 3 bodies and yet we can find a very good approximation of where the >> moon will be 1000 years from now. > Yes, but that quasi-stability might only last a few million or even just a > few thousand years. There could not be a planet stable enough to host life or > ETI. But with 8 planets and millions of less massive objects in orbit around the sun isn't our own solar system just quasi stable? I don't think anybody has proven that in 1 billion years things might get chaotic and the earth could fall towards the sun or be ejected into an orbit beyond that of Neptune. There is chaos in the solar system. It is not completely integrable. Henri Poincare won the prize offered by the king of Sweden to solve the stability of the solar system problem. Poincare showed there was no stability. However, there is something called the Lyapunov exponent for the measure of chaos or separation of reality from a truncated set of assumed initial conditions. A putative planet arounda star orbiting a 10 solar mass black hole at around 4AU will have a huge Lyapunov exponent compared to the much tamer solar system. LC John K Clark See what's on my new list at Extropolis e7r -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-li...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/35913347-2614-4da4-aeca-ab4b1244cf90n%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/8ee8692b-cbaf-405d-8554-a31ced87149an%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/1480635131.1237065.1668117303834%40mail.yahoo.com.
