One of the most basic structural aspects of relativistic spacetime is the description of how time and distances are altered by motion. The theory of special relativity describes a spacetime framework for linear constant motion ...
General Physics
May 11, 2021
4
771
One of the fundamental challenges of physics is the reconciliation of Einstein's theory of relativity and quantum mechanics. The necessity to critically question these two pillars of modern physics arises, for example, from ...
Quantum Physics
Oct 7, 2019
0
646
Like the waistband of a couch potato in midlife, the orbits of planets in our solar system are expanding. It happens because the Sun's gravitational grip gradually weakens as our star ages and loses mass. Now, a team of NASA ...
Astronomy
Jan 18, 2018
1
190
At the center of our galaxy, roughly 26,000 light years from Earth, lies the supermassive black hole (SMBH) known as Sagittarius A*. Measuring 44 million km across, this object is roughly 4 million times as massive as our ...
Astronomy
Aug 14, 2017
3
5662
In the case of solar system bodies passing close to the sun, there are two important effects playing a crucial role in the orbital evolution. One of the effects is from the general relativity and the other effect is from ...
Space Exploration
Apr 27, 2017
2
785
Some fundamental properties of the coinage metal elements gold, silver and copper, such as chemical behaviour or colours, are already predetermined in their atoms. The unique properties of gold can be largely explained by ...
Materials Science
Oct 30, 2015
86
514
(Phys.org) —Eight hundred and eighty nine exoplanets (planets around stars other than our Sun) have been discovered to date. Most of them were found using the Kepler satellite, which spots small dips in a star's light as ...
Astronomy
May 27, 2013
12
0
Nonoxidative coupling of methane (NOCM) exhibits promising prospect in that it affords value-added hydrocarbons and hydrogen with high atom economy. However, the challenge remains in methane's direct, selective conversion ...
Analytical Chemistry
Jan 9, 2024
0
17
In Einstein's famous theory of relativity the concepts of immutable space and time aren't just put aside, they're explicitly and emphatically rejected. Space and time are now woven into a coexisting fabric. That is to say, ...
General Physics
Nov 13, 2023
14
104
It's nice to have a feel-good story every once in a while, so here's one to hold off the existential dread: the Earth isn't likely to get flung off into deep space for at least 100,000 years. In fact, all of the solar system's ...
Astronomy
Jul 5, 2022
1
128
