A Star Orbiting in the Extreme Gravity of a Black Hole Validates General Relativity
The star S0-2 gets so close to the supermassive black hole at the center of the galaxy that it can be used to test our fundamental understanding of gravity.
Smithsonian
Topics: Black Holes Gravity Relativity Stars
Alternative Theory of Gravity Makes a Nearly Testable Prediction
A massive simulation done with a “chameleon” theory of gravity.
Ars Technica
Topics: Dark Energy Dark Matter Galaxies Gravity Relativity Stars Universe
Gravity’s Residue
An unusual approach to unifying the laws of physics could solve Hawking’s black-hole information paradox — and its predicted gravitational “memory effect” could be picked up by LIGO.
FQXi
Topics: Black Holes Gravity Relativity
Paradox Is Illuminating the Black Hole
How reconciling opposites is driving the science of black holes forward.
Nautilus
Topics: Black Holes Quantum Mechanics Relativity
Why Is the Quantum So Mysterious?
Quantum mechanics is how the world works at deepest levels. But nobody has any idea why.
Closer To Truth
Topics: Entanglement Quantum Gravity Quantum Mechanics Relativity Superposition
Milky Way’s Black Hole Provides Long-Sought Test of Einstein’s General Relativity
An observation decades in the making confirms predictions about how light behaves in an immense gravitational field.
Nature
Topics: Black Holes Relativity
Physics Needs Philosophy / Philosophy Needs Physics
Philosophy has always played an essential role in the development of science, physics in particular, and is likely to continue to do so.
Scientific American
Topics: Knowledge Quantum Gravity Quantum Mechanics Relativity
Quantum Experiment in Space Confirms That Reality Is What You Make It
The new work shows that a photon’s nature remains undefined even over thousands of kilometers, says Philippe Grangier, a physicist at the Institute of Optics in Palaiseau, France.
Science
Topics: Quantum Mechanics Relativity
A Defense of the Reality of Time
Time isn’t just another dimension, argues Tim Maudlin. To make his case, he’s had to reinvent geometry.
Quanta Magazine
Topics: Nature of Time Relativity
Can We Really Travel Back in Time to Change History?
Physicist Paul Davies responds to “Mr. Thursday,” Emily St. John Mandel’s short story about time travel.
Future Tense, Slate
Topics: Nature of Time Quantum Mechanics Relativity
A Quantum State of Mind
Are physicists on a path to upend some of the time-tested fundamental theories of physics?
The New York Academy of Sciences
Where Physics and Philosophy Intersect
At its core, physics addresses the fundamental problems that shape our philosophical outlook.
Topics: Quantum Gravity Quantum Mechanics Reality Relativity
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