Astrophysicists often talk about gravitational lensing, one of the most interesting aspects of light’s infamous particle-wave duality. This phenomenon shows in a predictable and measurable way how the small mass within each photon of light shooting out from a distant star actually bends the light in the gravitational pull of dense objects along its path. … Read more
When astronauts return to Earth, it can take some time for them to adjust to the return of gravity. A viral video of NASA astronaut Tom Marshburn cursing gravity while trying to place a pen in the air was actually a parody. But that’s not the case too much As a new study nearly 20 … Read more
A new analysis finds that gravity obeys Newton’s inverse square law over hundreds of millions of light years, even when tested using 300,000 galaxies. This result leaves little room for alternatives that weaken gravity over long distances. It also sharpens the case for invisible masses that shape the motion of the universe. beyond the distance … Read more