What is space-time? Depending on how fast you're moving or how close you are do Earth's gravity can change the way time feels ...

One of the biggest challenges in modern physics is uniting quantum mechanics and general relativity. A new experiment may ...

In pure general relativity, with no other modifications or considerations of other physics, they remain black for eternity. Once one forms, it will just hang out there, being a black hole, forever.

For the first time, a mathematical framework proves that Einstein’s theory of general relativity, which explains the relationship between space, time, and gravity, is in alignment with quantum ...

According to Einstein's theory of general relativity, gravity results from how mass warps space and time. The greater an object's mass, the stronger its gravitational pull. Scientists have largely ...

Previously, uniting general relativity with quantum physics has meant taking space-time — the three dimensions of space and the one dimension of time, unified as a single 4D entity that is at ...

However, all attempts to blend general relativity and quantum physics necessarily introduce deviations from Einstein's theory. Therefore, Einstein's gravity cannot be the ultimate theory of gravity.

Atomic clocks measure Einstein's general relativity at millimeter scale Date: February 16, 2022 Source: National Institute of Standards and Technology (NIST) Summary: Physicists have measured ...

Distorted neutron stars give up secrets of dense nuclear matter In this case, general relativity successfully passed the test. “Our result means that parity is preserved in gravity at the scale of ...

When the first-ever image of a black hole was released in April 2019, it marked a powerful confirmation of Albert Einstein’s theory of gravity, or general relativity. The theory not only ...

Test of general relativity by a pair of transportable optical lattice clocks. Nature Photonics, 2020; DOI: 10.1038/s41566-020-0619-8 ...