Articles
20 articles on black hole physics,general relativity, and cosmology.
The quantum process that makes black holes slowly evaporate — explained from first principles.
No wall, no fire, no surface. Just a mathematical boundary where causality ends.
Ergospheres, frame dragging, and extracting energy from rotation.
How LIGO heard two black holes merge 1.3 billion light-years away.
The tidal physics behind the most evocatively named phenomenon in astrophysics.
Does information survive when a black hole evaporates? The deepest open problem in physics.
How the ergosphere of a Kerr black hole can be used to extract rotational energy.
The four laws that govern black holes — and their shocking connection to entropy.
A black hole is completely described by just three numbers: mass, charge, and spin.
The mathematical proof that spacetime must break down inside a black hole.
How Karl Schwarzschild solved Einstein's equations from the trenches of World War I.
General relativity permits shortcuts through spacetime. Can they be traversed?
Active galactic nuclei are the most luminous sustained objects in the universe.
When a star wanders too close to a black hole and is torn apart in real time.
Every binary merger is a laboratory for general relativity at its most extreme.
The superheated plasma ring that powers quasars, X-ray binaries, and the EHT images.
What separates a neutron star from a black hole — and what happens when they merge.
From hydrogen fusion to iron core collapse — the complete stellar lifecycle.
Could the dark matter problem be solved by black holes formed in the first second?
How gravity slows time — and the remarkable places this effect has been measured.