general relativity
Scientists Make Breakthrough in Warping Time at Smallest Scale Ever
Scientists were able to measure time dilation at a distance of just a millimeter, about the width of a pencil tip.
Scientists Have Seen Light from the Far Side of a Black Hole for the First Time
The detection confirms a key prediction of Einstein's theory of general relativity.
New Image of a Black Hole's Powerful Jets Is Challenging Scientists' Theories
The Event Horizon Telescope has taken the best images yet of a radiant jet shooting out of the nearest active galaxy to the Milky Way.
Scientists Confirm Stephen Hawking’s 50-Year-Old Theory About Black Holes
A wave signal from space validates Hawking’s prediction that the area of an event horizon should never decrease.
Time Travel Without Mind-Bending Paradoxes Is Possible, Mathematical Modeling Suggests
“Agents could have free choice to make any action they wanted and no paradox would arise because the events just adjust themselves to remain consistent," said study author Germain Tobar.
A Star Is Orbiting our Galaxy's Black Hole in a Stunning Pattern
In yet another win for Albert Einstein’s theories, scientists report the first ever detection of “Schwarzschild precession” around a black hole.
Scientists Witnessed a Dead Star ‘Dragging’ the Fabric of Reality
Astronomers spent 20 years using a dead star as a gigantic "cosmic clock" to test a mind-blowing prediction of Einstein's general theory of relativity.
Stephen Hawking’s Last Paper Is Now Online
The black hole information paradox fascinated Hawking for decades, and is the topic of his final research study.
Physicists Used Atomic Clocks to Test Einstein’s Theory of Relativity in a 14-Year Experiment
A foundational thought experiment in Einstein’s theory of general relativity just got its most precise confirmation ever by turning the entire Earth into a laboratory.
One of the Greatest Cosmic Mysteries Was Solved By David Shoemaker’s Device
LIGO's detection of gravitational waves was an achievement comparable to Galileo’s telescope. Meet the man whose team built the detector.
Scientists Think the Speed of Light Has Slowed, and They're Trying to Prove It
A controversial theory that would overturn Einstein’s theory of general relativity could soon be tested.
Watch The Mechanics Behind Time Travel
The effects of time dilation on various spacecraft is visualized in Chomko & Rosier's 'Relative Clocks.'