The gravitational constant G determines the strength of gravity—the force that makes apples fall to the ground or pulls the Earth in its orbit around the sun. It is part of Isaac Newton's law of universal gravitation, which ...
General Physics
Jul 11, 2022
10
1009
We can model the motions of planets in the Solar System quite accurately using Newton's laws of physics. But in the early 1970s, scientists noticed that this didn't work for disk galaxies—stars at their outer edges, far ...
Astronomy
Jul 8, 2022
157
3200
NASA's Ingenuity Mars Helicopter recently surveyed both the parachute that helped the agency's Perseverance rover land on Mars and the cone-shaped backshell that protected the rover in deep space and during its fiery descent ...
Space Exploration
Apr 27, 2022
5
101
Quantum physical experiments exploring the motion of macroscopic or heavy bodies under gravitational forces require protection from any environmental noise and highly efficient sensing.
Quantum Physics
Mar 15, 2022
4
2274
On Monday, Jan. 24, engineers plan to instruct NASA's James Webb Space Telescope to complete a final correction burn that will place it into its desired orbit, nearly 1 million miles away from the Earth at what is called ...
Astronomy
Jan 24, 2022
0
97
Physicists at Case Western Reserve University and Tufts University say they've changed the shape of a flat liquid crystal surface without applying any local stimulus—essentially remotely altering its physical appearance ...
Condensed Matter
Oct 19, 2021
0
1034
Asteroids embody the story of our solar system's beginning. Jupiter's Trojan asteroids, which orbit the Sun on the same path as the gas giant, are no exception. The Trojans are thought to be left over from the objects that ...
Space Exploration
Oct 18, 2021
0
1125
Researchers have developed a new method to measure force and atomic bonds at the nanoscale that reveals that the speed of sound depends on the structure it is traveling through.
Nanomaterials
Sep 16, 2021
0
34
When it comes to a marriage with quantum theory, gravity is the lone holdout among the four fundamental forces in nature. The three others—the electromagnetic force, the weak force, which is responsible for radioactive ...
Quantum Physics
Sep 7, 2021
2
700
Brown dwarfs are astronomical objects with masses between those of planets and stars. The question of where exactly the limits of their mass lie remains a matter of debate, especially since their constitution is very similar ...
Astronomy
Aug 27, 2021
107
565
