General Relativity

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Tag: Black Holes
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Tag: Sgr A*
Einstein's hand reaches out from a black hole and torques a star's orbit
Phil Plait
Apr 17, 2020
Artwork depicting (exaggerated) orbital precession of a star orbiting a black hole; every time it approaches the orientation of the orbit shifts. Credit: ESO/L. Calçada
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Tag: Sgr A*
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Tag: neutron stars
A dead star's spin is dragging the fabric of spacetime along with it
Phil Plait
Feb 4, 2020
Artwork of a pulsar emitting beams of energy as it orbits a white dwarf; the warping of spacetime is depicted as the change in an imaginary grid around them. The pulsar is not to scale; the white dwarf is hundreds of times larger. ESO/L. Calçada
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Tag: Black Holes
What does a black hole look like up close?
Phil Plait
Sep 26, 2019
A simulation of what a black hole with a disk of gas swirling around it would look, given the bizarre effects of its fierce gravity on the light from the disk. Credit: NASA’s Goddard Space Flight Center/Jeremy Schnittman
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Tag: Black Holes
Tag: Science
Tag: Bad Astronomy
Tag: Black Holes
Astronomers watch an active black hole dragging spacetime around it
Phil Plait
Apr 30, 2019
When the spin axis of a black hole is tipped relative to the plane of the material coming in, it drags the material out of that plane as the fabric of spacetime warps around the black hole. Credit: ICRAR
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Tag: General Relativity
Muons, relatively speaking
Phil Plait
Nov 16, 2018
Muons pose an interesting problem, but you can learn the solution in Minute Physics. Credit: Henry Reich
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Tag: General Relativity
Tag: Science
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Tag: Black Holes
Astronomers see material orbiting a black hole *right* at the edge of forever
Phil Plait
Nov 8, 2018
A computer simulation shows the light emitted from dust swirling at 30% the speed of light around a black hole. Incredibly strong gravity affects the path the light takes, creating the warped structure. Credit: ESO/Gravity Consortium/L. Calçada
Tag: Science
Tag: Bad Astronomy
Tag: Black Holes