Tag: Einsteins

New measurements of the solar spectrum verify Einstein’s theory of General Relativity

New measurements of the solar spectrum verify Einstein's theory of General Relativity
Artistic representation of the Sun, the Earth and the Moon (not to scale) with the space-time curvature of Einstein’s General Relativity over the spectrum of sunlight reflected from the Moon (in colors from blue to red). The spectrum is taken with the HARPS instrument and calibrated with the LFC. Credit: Gabriel Pérez Díaz, SMM (IAC).

An international team of researchers led by the Instituto de Astrofísica de Canarias (IAC) has measured, with unprecedented accuracy, the gravitational redshift of the Sun, a change in frequency of the lines in the solar spectrum which is produced when the light escapes from the gravitational field of the Sun on its way to Earth. This work, which verifies one of the predictions of Einstein’s General Relativity, is to be published in the journal Astronomy & Astrophysics.


The General Theory of Relativity, published by Albert Einstein between 1911 and 1916, introduced a new concept

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First photo of a black hole supports Einstein’s theory of relativity

The first image of a black hole, captured in 2019, has revealed more support for Albert Einstein’s theory of general relativity. The new finding has suggested his theory is now 500 times harder to beat.



a star in the background: This is a simulation of M87's black hole showing the motion of plasma as it swirls around the black hole. The bright thin ring that can be seen in blue is the edge of what researchers call the black hole shadow.


© L. Medeiros/C. Chan/D. Psaltis/F. Özel; UArizona/IAS
This is a simulation of M87’s black hole showing the motion of plasma as it swirls around the black hole. The bright thin ring that can be seen in blue is the edge of what researchers call the black hole shadow.

Einstein’s theory, or the idea that gravity is matter warping space-time, has persisted for a hundred years as new astronomical discoveries have been made.

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Researchers from the Event Horizon Telescope collaboration, the team that imaged the central black hole of the M87 galaxy last year, analyzed the black hole’s “shadow.”

Black holes don’t cast shadows in the typical sense because they aren’t solid objects that

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Einstein’s description of gravity just got much harder to beat

Einstein's description of gravity just got much harder to beat
Visualization of the new gauge developed to test the predictions of modified gravity theories against the measurement of the size of the M87 shadow. Credit: D. Psaltis, UArizona; EHT Collaboration

Einstein’s theory of general relativity—the idea that gravity is matter warping spacetime—has withstood over 100 years of scrutiny and testing, including the newest test from the Event Horizon Telescope collaboration, published today in the latest issue of Physical Review Letters.


According to the findings, Einstein’s theory just got 500 times harder to beat.

Despite its successes, Einstein’s robust theory remains mathematically irreconcilable with quantum mechanics, the scientific understanding of the subatomic world. Testing general relativity is important because the ultimate theory of the universe must encompass both gravity and quantum mechanics.

“We expect a complete theory of gravity to be different from general relativity, but there are many ways one can modify it. We found that whatever the correct

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