The Earth, solar system, the entire Milky Way and the few thousand galaxies closest to us move in a vast "bubble" that is 250 million light years in diameter, where the average density of matter is half as high as for the ...
Astronomy
Mar 10, 2020
80
11244
Scientists behind a theory that the speed of light is variable - and not constant as Einstein suggested - have made a prediction that could be tested.
General Physics
Nov 25, 2016
948
9930
So, how can galaxies be traveling faster than the speed of light when nothing can travel faster than light?
Astronomy
Oct 13, 2015
22
189
The observed acceleration of the Hubble expansion rate has been attributed to a mysterious "dark energy" which supposedly makes up about 70% of the universe. Professor Subir Sarkar from the Rudolf Peierls Centre for Theoretical ...
Astronomy
Nov 27, 2019
17
2428
The solar system has eight planets. In 2006, astronomers reclassified Pluto as a dwarf planet, the same class that contains Eris, Sedna, Quaoar, Ceres and perhaps many more solar system small bodies. These are defined approximately ...
Astronomy
Mar 14, 2022
5
815
Flavor Flav knows what time it is. At least he does for Flavor Flav. Even with all his moving and accelerating, with the planet, the solar system, getting on planes, taking elevators, and perhaps even some light jogging. ...
General Physics
Aug 29, 2014
48
1
In 2004, astronomers examining a map of the radiation leftover from the Big Bang (the cosmic microwave background, or CMB) discovered the Cold Spot, a larger-than-expected unusually cold area of the sky. The physics surrounding ...
Astronomy
Apr 20, 2015
23
3036
The Universe is a magic time window, allowing us to peer into the past. The further out we look, the further back in time we see. Despite our brains telling us things we see happen at the instant we view them, light moves ...
Astronomy
Mar 6, 2015
14
500
Star light, star bright, the James Webb Space Telescope has seen its first star (though it wasn't quite tonight)—and even taken a selfie, NASA announced Friday.
Space Exploration
Feb 11, 2022
0
1526
The sight of the Millennium Falcon making the "jump to lightspeed" is one of the most iconic images from the Star Wars trilogy.
General Physics
Jan 14, 2013
20
0
