On Mon, Nov 7, 2022 at 8:12 PM Lawrence Crowell < goldenfieldquaterni...@gmail.com> wrote:
> Planetary orbits around the sun-like star would not be stable. A planet > around the sun-like star would define nonintegrable 3-body problem. > 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. John K Claek >> -----Original Message----- >> From: John Clark <johnk...@gmail.com> >> To: 'Brent Meeker' via Everything List <everyth...@googlegroups.com> >> Sent: Sun, Nov 6, 2022 8:32 am >> Subject: A sun-like star orbiting a black hole >> >> The November 2 2022 issue of the journal "Monthly Notices Of The Royal >> Astronomical Society'' reports on the discovery of the nearest Black Hole >> ever found, it's just 1600 light years from Earth, that's 3 times closer >> than the next nearest one. It has nearly 10 times the mass of the sun but >> what makes it unusual is that it's a very calm and quiet Black Hole and is >> not producing any detectable X-rays or radio waves, apparently very little >> matter is currently falling into it. The hole was found by the wobble it >> induced in a G type star very similar to the sun, with the same metallic >> content and with 93% of the sun's mass, that is in orbit around the >> Black Hole. >> >> Another unusual thing about it is the orbital period is186.6 days, and >> that's the longest orbital period ever found for a star orbiting a stellar >> mass Black Hole, and its orbit is also the most nearly circular of any ever >> found. The original star that produced the Black Hole must've had at least >> 20 solar masses and exploded in a supernova; so it's a mystery why the >> sun-like star that is now in orbit around the Black Hole looks so normal >> and why its orbit is so nearly circular considering the fact that it had to >> endure a very nearby supernova and the star it's orbiting suddenly lost >> half its original mass during the supernova cataclysm. >> >> A Sun-like star orbiting a black hole >> <https://academic.oup.com/mnras/advance-article-abstract/doi/10.1093/mnras/stac3140/6794289?redirectedFrom=fulltext&login=false> >> >> John K Clark See what's on my new list at Extropolis >> <https://groups.google.com/g/extropolis> >> sle >> >> >> >> -- >> 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/CAJPayv3egGyf4HLdrtiCLF%3D01TdYxj%3DrrykbtM99NMaa559qZQ%40mail.gmail.com >> <https://groups.google.com/d/msgid/everything-list/CAJPayv3egGyf4HLdrtiCLF%3D01TdYxj%3DrrykbtM99NMaa559qZQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > 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/db79bdaf-79b2-466f-85a3-afa3812fc9e5n%40googlegroups.com > <https://groups.google.com/d/msgid/everything-list/db79bdaf-79b2-466f-85a3-afa3812fc9e5n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CAJPayv0LzPC%2B%3D7YJy_45oO0UEzDADadirNvwe6G5nYdDtnsVtA%40mail.gmail.com.
