QuoteIn this video, we will talk about new visual evidence of the existence of the blackhole in the middle of the Milky Way galaxy known as Sagittarius A*
https://www.youtube.com/watch?v=OpeN_kuNN0U
Detection of orbital motions near the last stable circular orbit of the
massive black hole SgrA* (http://https://www.eso.org/public/archives/releases/sciencepapers/eso1835/eso1835a.pdf)
I don't think many astrophysicists doubted the existence of this black hole, but it's nice to get confirmation.
Report URL fails. The video is good. This is probably what they are talking about having evidence of ...
There is a zone where you can't not spiral into the black hole. But besides that, there is a zone where you can't not orbit the black hole. This is the ergosphere.
https://en.wikipedia.org/wiki/Kerr_metric
This article shows the various zones of rotation black holes. It is more complicated than the simplistic non-rotating black hole model most people are familiar with.
Quote from: Unbeliever on November 12, 2018, 04:32:37 PM
https://www.youtube.com/watch?v=OpeN_kuNN0U
Detection of orbital motions near the last stable circular orbit of the
massive black hole SgrA* (http://https://www.eso.org/public/archives/releases/sciencepapers/eso1835/eso1835a.pdf)
I don't think many astrophysicists doubted the existence of this black hole, but it's nice to get confirmation.
So how do I get all my ink pens and my car keys out of there?
It is nice to have "another" line of evidence to support the existence of Sagittarius A, but the claim made in the video that this was the first observational evidence is incorrect. Scientists at UCLA and the Max Planck Institute have been tracking the orbits of several stars around Sagittarius A for more than two decades. That's long enough to track S0-2 for more than 2 full orbits and calculate the orbits of S0-16 and S0-19 with a high degree of certainty. Those orbits can't be explained by anything but a supermassive black hole.
(http://www.astro.ucla.edu/~ghezgroup/gc/images/research/science/ghez1.jpg)
May be they mean the first detailed observation? Because I saw other links.
Quote from: drunkenshoe on November 13, 2018, 08:33:19 AM
May be they mean the first detailed observation? Because I saw other links.
No, scientists have to talk like Trump about their current brain child ... to get more funding.
Quote from: Gawdzilla Sama on November 13, 2018, 07:12:39 AM
So how do I get all my ink pens and my car keys out of there?
Um...carefully?
Quote from: Unbeliever on November 13, 2018, 01:22:51 PM
Um...carefully?
Ultimate sci-fi roach motel ... Disney Inc checks in (remember that movie?) but doesn't check out.
It seems there may be a whole swarm of black holes near the galactic center:
https://www.space.com/40196-black-hole-swarm-milky-way-heart.html
Quote from: Unbeliever on November 13, 2018, 01:25:24 PM
It seems there may be a whole swarm of black holes near the galactic center:
https://www.space.com/40196-black-hole-swarm-milky-way-heart.html
Definitely where Spock's brother, and angels, fear to red.
Quote from: Unbeliever on November 13, 2018, 01:25:24 PM
It seems there may be a whole swarm of black holes near the galactic center:
https://www.space.com/40196-black-hole-swarm-milky-way-heart.html
Mutual gravitational attraction? The SMBH is an attention freak?
Yeah, black hole groupies - who knew!? :-D