At https://phys.org/news/2021-12-einstein-greatest-theory-extreme-stars.html … an international team of scientists has been looking at extreme stars known as pulsars, through seven radio telescopes around the world. They set out to challenge Einstein's theory of general relativity. It is thought the theory breaks down at some points as it is incompatible with quantum mechanics – and the physics at the atomic level. Physicists are actively trying to test general relativity in order to open the door to a new unified theory. So far, the door has eluded them.
In this study, they choose pulsars as something that does not seem to comply with the theory. They claim they are highly magnetised rotating compact stars that emit beams of electromagnetic radiation from their magnetic poles. They weigh more than our Sun, it is hypothesized, but are small and incredibly dense objects that produce radion beams that sweep across the sky like a lighthouse beacon.
On page 82 of 'The Electric Universe' Thornhill and Talbot say that a pulsar is thought to be a tiny neutron star that can spin up to thousands of times a second without flying apart. Somehow it contrives to emit rotating beams of X-rays, like a lighthouse beam at night. They say that commonsense suggests the mechanical model is awry as some pulsars spin beyond the tachometre red line. Plasma physicists, on the other hand, have shown that complex pulsar signals can be explained by plasma discharges in a stellar magnetosphere.
See also https://phys.org/news/2021-12-einstein-theory-rigorous-year.html … on the same research but from a different perspective, and a different scientist.