What's up in
Since the 1970s, physicists have described black holes using borrowed versions of the laws of thermodynamics. But are black holes really thermodynamic systems? Craig Callender worries that the analogy has been stretched too far.
At stake are fundamental ideas about how black holes form — and a six-way bet.
How do black holes merge and make gravitational waves? Maybe with a little help from their friends.
Tiny, dim “dwarf” galaxies have been found to hide gas-spewing black holes.
Opinions differ about what recent measurements of a sound-trapping fluid reveal about light-trapping black holes.
The astrophysicist Janna Levin reflects on the newly unveiled, first-ever photograph of a black hole.
Priyamvada Natarajan has pioneered the mapping and modeling of the universe’s invisible contents, especially dark matter and supermassive black holes.
Perfect black holes are versatile mathematical tools. Just don’t mistake them for the real thing.
The same codes needed to thwart errors in quantum computers may also give the fabric of space-time its intrinsic robustness.