The article says they're referring to Einstein-Rosen bridges, which are unstable wormholes that don't require negative energy, unlike the stable traversable wormholes (for traversable wormholes, Kip Thorne originally proposed that the required negative energy might be possible in quantum mechanics due to the Casimir effect, I don't know if that's still viable though). Not sure if quantum gravity would be expected to change things, but in general relativity anyone traveling through an Einstein-Rosen bridge at non-FTL speeds would see the wormhole throat "snap shut" into a singularity before they could get to the other side, though observers entering the two different wormhole mouths could meet in the interior before being crushed by the singularity. There's a nice gif at https://web.archive.org/web/20100528150236/http://casa.colorado.edu/~ajsh/schww_gif.html from the "Instability of the Schwarzschild Wormhole" section of the page at https://web.archive.org/web/20100328163321/http://casa.colorado.edu/~ajsh/schww.html
On Tue, Nov 15, 2022 at 3:00 PM Brent Meeker <meekerbr...@gmail.com> wrote: > A stable wormhole requires threading by negative energy density. Since no > such negative energy field is know and it's existence would imperil the > stability of matter, its existence seems highly unlikely. > > Brent > > On 11/15/2022 11:17 AM, spudboy100 via Everything List wrote: > > Me: Forget acronyms, or even Einstein's gravitic Reference Frame dragging > (His movie reel analogy), Instead ask yourselves are these physicists > correct in proposing that some black holes are wormholes? > > Objects We Thought Were Black Holes May Actually Be Wormholes, Scientists > Say (futurism.com) <https://futurism.com/objects-black-holes-wormholes> > > For this science fiction boy, I say interesting and maybe, hopeful? Let > the hard science Bohr flavor of quantum mechanics and relativity yield for > in objection, how this is fictional, improbable, and crapola? For > reference frames, I know Einstein locked this in with time, which he > discussed with Michele Besso (remember the letter to Beso's family?) but > otherwise, how valuable to astronomers and physicists is ref frame dragging > and all that? Does it predict do you think? > > The validity of a science is its ability to predict-Vanevar Bush. > > > -----Original Message----- > From: Alan Grayson <agrayson2...@gmail.com> <agrayson2...@gmail.com> > To: Everything List <everything-list@googlegroups.com> > <everything-list@googlegroups.com> > Sent: Tue, Nov 15, 2022 1:30 pm > Subject: Re: Is Special Relativity valid for accelerating frames of > reference? TY. > > RA. > > On Tuesday, November 15, 2022 at 6:19:02 AM UTC-7 johnk...@gmail.com > wrote: > > On Tue, Nov 15, 2022 at 6:38 AM Alan Grayson <agrays...@gmail.com> wrote: > > > *> IHA = ?* > > > I Hate Acronyms. > > John K Clark See what's on my new list at Extropolis > <https://groups.google.com/g/extropolis> > 8gfk > > > -- > 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/a67cbbac-69e0-40a9-8ee2-8e0caeb344d5n%40googlegroups.com > <https://groups.google.com/d/msgid/everything-list/a67cbbac-69e0-40a9-8ee2-8e0caeb344d5n%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/2142008288.338975.1668539879975%40mail.yahoo.com > <https://groups.google.com/d/msgid/everything-list/2142008288.338975.1668539879975%40mail.yahoo.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/d12ede59-d985-c283-5475-6af7efd26f53%40gmail.com > <https://groups.google.com/d/msgid/everything-list/d12ede59-d985-c283-5475-6af7efd26f53%40gmail.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/CAPCWU3Kib3DeQ0%3D3aB7fMuX0jDe62zrjn-Fbmv3%2B4-fZhjj_Xg%40mail.gmail.com.
