Einstein wins again: Star orbits black hole just like GR predicts

After nearly 30 years, VLT’s new observations show star moves in rosette-shaped orbit.

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Youtube video

Star near Milky Way’s black hole has ‘rosette-shaped’ orbit

I think probably general relativity is non-controversial these days

Is the star being bumped into the next magnetic feild line?

That is BHs have magnetic field lines?

Apparently yes

https://www.iflscience.com/space/magnetic-fields-can-be-strong-black-holes-gravity/

dv said:

I think probably general relativity is non-controversial these days

yeah when we saw it we thumped foreheads into tables

but Newton won again

and the tables thumped foreheads

dv said:

I think probably general relativity is non-controversial these days

I will remind you that Einstein’s ideas are ‘just a theory’.

You know, like evolution is ‘just a theory’.

Next thing, you’ll be saying that theories might have some scientific validity, and where would that leave Genesis? Huh? Where, huh?

captain_spalding said:

dv said:

I think probably general relativity is non-controversial these days

I will remind you that Einstein’s ideas are ‘just a theory’.

You know, like evolution is ‘just a theory’.

Next thing, you’ll be saying that theories might have some scientific validity, and where would that leave Genesis? Huh? Where, huh?

theoretically in the dustbin i guess

captain_spalding said:

dv said:

I think probably general relativity is non-controversial these days

I will remind you that Einstein’s ideas are ‘just a theory’.

You know, like evolution is ‘just a theory’.

Next thing, you’ll be saying that theories might have some scientific validity, and where would that leave Genesis? Huh? Where, huh?

évolution is a theorem

SCIENCE said:

captain_spalding said:

dv said:

I think probably general relativity is non-controversial these days

I will remind you that Einstein’s ideas are ‘just a theory’.

You know, like evolution is ‘just a theory’.

Next thing, you’ll be saying that theories might have some scientific validity, and where would that leave Genesis? Huh? Where, huh?

évolution is a theorem

Well, maybe evolution with an accent aigu, is.

SCIENCE said:

dv said:

I think probably general relativity is non-controversial these days

yeah when we saw it we thumped foreheads into tables

but Newton won again

and the tables thumped foreheads

ChrispenEvan said:

captain_spalding said:

dv said:

I think probably general relativity is non-controversial these days

I will remind you that Einstein’s ideas are ‘just a theory’.

You know, like evolution is ‘just a theory’.

Next thing, you’ll be saying that theories might have some scientific validity, and where would that leave Genesis? Huh? Where, huh?

theoretically in the dustbin i guess

or like fossil fuels, keep them buried, or turn them into CO2

Link to paper

Dynamically important magnetic fields near accreting supermassive black holes
https://www.nature.com/articles/nature13399

Tau.Neutrino said:

Link to paper

Dynamically important magnetic fields near accreting supermassive black holes
https://www.nature.com/articles/nature13399

opps

Ill try that again

Detection of the Schwarzschild precession in the orbit of the starS2 near the Galactic centre massive black hole

https://www.eso.org/public/archives/releases/sciencepapers/eso2006/eso2006a.pdf

Tau.Neutrino said:

Is the star being bumped into the next magnetic feild line?

That is BHs have magnetic field lines?

Apparently yes

https://www.iflscience.com/space/magnetic-fields-can-be-strong-black-holes-gravity/

Not bumped just following

Is the star following the black holes magnetic field lines?

That sounds better.

Tau.Neutrino said:

Tau.Neutrino said:

Is the star being bumped into the next magnetic feild line?

That is BHs have magnetic field lines?

Apparently yes

https://www.iflscience.com/space/magnetic-fields-can-be-strong-black-holes-gravity/

Not bumped just following

Is the star following the black holes magnetic field lines?

That sounds better.

I think it’s just precession. Same thing happens to Mercury:

https://en.m.wikipedia.org/wiki/Tests_of_general_relativity

Tau.Neutrino said:

Tau.Neutrino said:

Is the star being bumped into the next magnetic feild line?

That is BHs have magnetic field lines?

Apparently yes

https://www.iflscience.com/space/magnetic-fields-can-be-strong-black-holes-gravity/

Not bumped just following

Is the star following the black holes magnetic field lines?

That sounds better.

No.

https://en.wikipedia.org/wiki/Tests_of_general_relativity#Perihelion_precession_of_Mercury

ChrispenEvan said:

Tau.Neutrino said:

Tau.Neutrino said:

Is the star being bumped into the next magnetic feild line?

That is BHs have magnetic field lines?

Apparently yes

https://www.iflscience.com/space/magnetic-fields-can-be-strong-black-holes-gravity/

Not bumped just following

Is the star following the black holes magnetic field lines?

That sounds better.

No.

https://en.wikipedia.org/wiki/Tests_of_general_relativity#Perihelion_precession_of_Mercury

Exactly so. The dominant GR deviation of an orbit from a Newtonian orbit is perihelion advance, not spiralling in.

I have to add here that Newtonian theory also allows perihelion advance, but of a different magnitude. How so, how does Newtonian physics allow non-Keplerian orbits? The chart below shows how. GR causes an anomalous perihelion advance of only 8% for Mercury, and the Lens-Thirring effect (frame dragging) is negligible.

The deviation of experiment and observation here is 1.9 sigma. Too large for comfort.

mollwollfumble said:

ChrispenEvan said:

Tau.Neutrino said:

Not bumped just following

Is the star following the black holes magnetic field lines?

That sounds better.

No.

https://en.wikipedia.org/wiki/Tests_of_general_relativity#Perihelion_precession_of_Mercury

Exactly so. The dominant GR deviation of an orbit from a Newtonian orbit is perihelion advance, not spiralling in.

I have to add here that Newtonian theory also allows perihelion advance, but of a different magnitude. How so, how does Newtonian physics allow non-Keplerian orbits? The chart below shows how. GR causes an anomalous perihelion advance of only 8% for Mercury, and the Lens-Thirring effect (frame dragging) is negligible.

The deviation of experiment and observation here is 1.9 sigma. Too large for comfort.

Any idea how they calculate the sigma?

As an engineer, it looks way too small ;)