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
In current quantum field theory, causality is typically defined by the vanishing of field commutators for spacelike separations. Two researchers at the University of Massachusetts and Universidade Federal Rural in Rio de ...
As an astronomer, there is no better feeling than achieving "first light" with a new instrument or telescope. It is the culmination of years of preparations and construction of new hardware, which for the first time collects ...
Astronomy
Oct 29, 2019
27
232
Scientists have discovered that a mysterious pressure dubbed "dark energy" makes up about 68% of the total energy content of the cosmos, but so far we don't know much more about it. Exploring the nature of dark energy is ...
Astronomy
Sep 13, 2019
4
239
Supercomputer simulations of galaxies have shown that Einstein's theory of General Relativity might not be the only way to explain how gravity works or how galaxies form.
Astronomy
Jul 8, 2019
38
6092
The International Space Station will host the most precise clocks ever to leave Earth. Accurate to a second in 300 million years the clocks will push the measurement of time to test the limits of the theory of relativity ...
General Physics
May 23, 2019
1
572
No Shadow of a Doubt, a new book by Daniel Kennefick, associate professor of physics at the University of Arkansas, tells the story of two research teams, organized by Arthur Stanley Eddington and Sir Frank Watson Dyson, ...
General Physics
Apr 19, 2019
1
50
The GRAVITY Collaboration, a team of researchers at several renowned institutes including the Max Planck Institute, LESIA Paris Observatory and the European Southern Observatory, has recently tested part of the Einstein Equivalence ...
(Phys.org) —Present-day physics cannot describe what happened in the Big Bang. Quantum theory and the theory of relativity fail in this almost infinitely dense and hot primal state of the universe. Only an all-encompassing ...
Quantum Physics
Sep 3, 2013
109
3
Before the Big Bang, space-time as we know it did not exist. So how was it born? The process of creating normal space-time from an earlier state dominated by quantum gravity has been studied for years by theorists at the ...
General Physics
Jul 9, 2013
5
1
