European Southern Observatory (ESO)
3 HN mentions · mentioned in 3 months, 2018–2024
0:20 · 1.5M views · Jul 26, 2018
A time-lapse from ESO's Very Large Telescope showing stars orbiting the supermassive black hole at the Milky Way's center over nearly 20 years.
HN links it as direct observational evidence for a massive invisible object at the galactic center.
3 comments from Hacker News
"static" is "Shwarzchild without rotation"? Do black holes have hair? Where is the Hawking radiation in these models? Does it diffuse through the boundary and the outer system? What about black hole jets? What about vortices? With Gross-Pitaevskii and SQR Superfluid Quantum Relativity [LINK] Ctrl-F Fedi , Bernoulli, Gross-Pitaevskii: > "Gravity as a fluid dynamic phenomenon in a superfluid quantum space. Fluid quantum gravity and relativity." (2015) [LINK] : > FWIU: also rejects a hard singularity boundary, describes curl and vorticity in fluids (with Gross-Pitaevskii,), and rejects antimatter. Actual observations of black holes; "This image shows the observed image of M87's black hole (left) the simulation obtained with a General Relativistic Magnetohydrodynamics model, blurred to the resolution of the Event Horizon Telescope [...]" [LINK] "Stars orbiting the black hole at the heart of the Milky Way" ESO. this video "Motion of stars around Sagittarius A*" Keck/UCLA. [LINK] /? M87a time lapse /? Sagittarius A time lapse /? black hole vortex dynamics
No actual photos yet exist of the environment immediately surrounding a black hole. But here is a time lapse video of stars orbiting Sag A: this video . The Event Horizon Telescope project is trying to image some black hole surroundings [LINK]
Then there's this video ESO's Very Large Telescope shot[0], of stars orbiting something that's a) very massive, and b) invisible. Does that constitute a direct observation of a black hole? -- [0] - this video