[Einstein's theory and #observation data] Researchers have compared #DarkEnergySurvey data with predictions from Einstein's theory of #GeneralRelativity ... and discovered some #incompatibility ...

“We have discovered that very far in the past, 6 and 7 billion years ago, the depth of the #GravitationalSinks is completely compatible with Einstein's predictions. On the other hand, in the period closer to today, 3.5 and 5 billion years ago, they are a little shallower than predicted by Einstein”, reveals Isaac Tutusaus, assistant astronomer at IRAP / Université Paul Sabatier Toulouse III.

Is the slowdown in the growth of gravitational sinks linked to the acceleration of the #expansion of our #Universe? The answer will undoubtedly be found in a few years' time, thanks to more numerous and more precise data from the @ec_euclid mission.

Details+: https://www.irap.omp.eu/en/2024/11/einsteins-equations-collide-with-the-mysteries-of-the-universe/

Dear geodesists, astronomers, and astrophysicists: Does any of you know of some publication that explicitly reports the expression for the metric in a Geocentric Terrestrial Reference System (GTRS) or in the more specific International Terrestrial Reference System (ITRS)?

Various publications (eg https://doi.org/10.1086/378162) and textbooks (eg https://doi.org/10.1017/CBO9781139507486) report and discuss the metrics for the Geocentric Celestial Reference System (GCRS), but not for the GTRS. (Even though it seems to me that the expression should be formally identical, as the off-diagonal timelike components take care of rotation).

Cheers! (Sorry for spamming borderline hashtags.)

The black hole information paradox:
#blackhole #quantumphysics #generalrelativity #thermodynamics #informationtheory #research #science

https://bigthink.com/starts-with-a-bang/black-hole-information-paradox-solved/

Testing quantum gravity in the lab:
#quantumphysics #quantummechanics #gravity #generalrelativity #model #research #science

https://phys.org/news/2024-09-theoretical-physicists-method-central-theory.html

A physics paper with an official publication date of Jan 2025, "On the same origin of quantum physics and general relativity from Riemannian geometry and Planck scale formalism", already has an expression of concern. If a paper is retracted before it is published, does the journal vanish in a catastrophic spacetime paradox?
https://www.pubpeer.com/publications/EC8B4C9BB47F33E3A30B7E443028F3
#PublicationEthics #ResearchIntegrity #Retractions #Elsevier #AstroParticlePhysics #QuantumPhysics #GeneralRelativity #QuantumGravity #PhysicsMastodon

Strange But Not Our Fault Dept : #GeneralRelativity gaves us one of the keys to the kingdom wrt to time and so we can calculate time dilations in near Earth orbits and correct frame differences enough to make #GPS work. We can use the same math around #BlackHoles and so huge displacements in time are no longer sci fi, just a consequence of the math.We probably need to know the intersection of #QuantumMechanics and #Gravity to understand how #UAP are doing what they're doing....