What is behind dark energy—and what connects it to the cosmological constant introduced by Albert Einstein? Two physicists from the University of Luxembourg point the way to answering these open questions of physics.
General Physics
Jan 24, 2023
32
1850
(PhysOrg.com) -- Today Oxford University scientists are joining in a special celebration of the first test of Albert Einstein’s theory of gravity on the remote African island where the ground-breaking experiment took place.
General Physics
May 29, 2009
1
0
Since the late 20th century, astronomers have been aware of data that suggest the universe is not only expanding, but expanding at an accelerating rate. According to the currently accepted model, this accelerated expansion ...
General Physics
Apr 18, 2011
177
0
Scientists have known for decades that the universe is expanding, but research in the past few years has shaken up calculations on the speed of growth—raising tricky questions about theories of the cosmos.
General Physics
Sep 13, 2019
66
287
How do you create the largest 3-D map of the universe? It's as easy as teaching 5,000 robots how to "dance." DESI, the Dark Energy Spectroscopic Instrument, is an experiment that will target millions of distant galaxies by ...
Astronomy
Oct 18, 2018
4
46
A huge amount of mysterious dark energy is necessary to explain cosmological phenomena, such as the accelerated expansion of the Universe, using Einstein's theory. But what if dark energy was just an illusion and general ...
General Physics
Mar 3, 2022
61
2088
Astronomers led by the University of Warwick have identified the oldest star in our galaxy that is accreting debris from orbiting planetesimals, making it one of the oldest rocky and icy planetary systems discovered in the ...
Astronomy
Nov 5, 2022
2
735
The universe is expanding at an ever-increasing rate, and while no one is sure why, researchers with the Dark Energy Survey (DES) at least had a strategy for figuring it out: They would combine measurements of the distribution ...
Astronomy
Apr 6, 2021
63
674
Only a small part of the universe consists of visible matter. By far the largest part is invisible and consists of dark matter and dark energy. Very little is known about dark energy, but there are many theories and experiments ...
General Physics
Aug 8, 2017
59
691
(Phys.org)—Dark energy, a mysterious substance thought to be speeding up the expansion of the Universe is really there, according to a team of astronomers at the University of Portsmouth and LMU University Munich.
Astronomy
Sep 12, 2012
144
0
