Cosmology: Einstein general relativity supported again (Introduction)

by David Turell , Thursday, January 30, 2020, 20:15 (1758 days ago) @ David Turell

A wobbly presessing proves it again:

https://www.sciencenews.org/article/wobbling-orbit-pulsar-proves-einstein-right-again-r...

"Over those two decades, the orbit of the pulsar has been slowly precessing, astronomers report. The precession isn’t much — the orbit’s tilt drifts by just 0.0004 degrees per year. But it matches what researchers expect if the neighboring white dwarf whips up spacetime as it spins.

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"This finding isn’t the first time that researchers have observed frame dragging. Satellites in Earth’s orbit have captured the relatively puny effect around our planet (SN: 11/24/15). And astronomers also have observed fluctuations in the frequency of X-ray light coming from a black hole, where frame dragging should be quite intense, suggesting that gas may be precessing around it.

"The new observation “is much more direct than mine,” says Adam Ingram, an astrophysicist at the University of Oxford who studied the black hole. “I can only infer that something is precessing in black hole systems, whereas the precision radio observations presented here leave little room for ambiguity.'”

Comment: Right again.