A remarkable prediction of Einstein's theory of general relativity—the theory that connects space, time, and gravity—is that rotating black holes have enormous amounts of energy available to be tapped.
General Physics
Jan 13, 2021
5
3010
General relativity is a profoundly complex mathematical theory, but its description of black holes is amazingly simple. A stable black hole can be described by just three properties: its mass, its electric charge and its ...
Astronomy
Dec 11, 2020
52
177
Matter is what makes up the universe, but what makes up matter? This question has long been tricky for those who think about it—especially for the physicists. Reflecting recent trends in physics, my colleague Jeffrey Eischen ...
General Physics
Dec 10, 2020
37
651
For decades, most physicists have agreed that string theory is the missing link between Einstein's theory of general relativity, describing the laws of nature at the largest scale, and quantum mechanics, describing them at ...
Quantum Physics
Nov 6, 2020
23
5777
An international research collaboration including Northwestern University astronomers has produced the most detailed family portrait of black holes to date, offering new clues as to how black holes form. An intense analysis ...
Astronomy
Oct 29, 2020
11
311
A phenomenon of quantum mechanics known as superposition can impact timekeeping in high-precision clocks, according to a theoretical study from Dartmouth College, Saint Anselm College and Santa Clara University.
General Physics
Oct 23, 2020
10
2275
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 ...
Astronomy
Oct 8, 2020
16
19921
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, ...
General Physics
Oct 1, 2020
52
1679
Paradox-free time travel is theoretically possible, according to the mathematical modeling of a prodigious University of Queensland undergraduate student.
General Physics
Sep 24, 2020
76
3584
Scientists observed what appears to be a bulked-up black hole tangling with a more ordinary one. The research team, which includes physicists from the University of Maryland, detected two black holes merging, but one of the ...
Astronomy
Sep 2, 2020
33
4011
