Neither Star nor Planet: A Strange Brown Dwarf Puzzles Astronomers
Brown dwarfs such as “The Accident” are illuminating the murky borderlands that separate planets from stars.
Brighter Than a Billion Billion Suns: Gamma-Ray Bursts Continue to Surprise
These ultrabright flashes have recently been tracked for days, upending ideas about the cataclysms that create them.
Squishy Neutron Star Setback Dampens Hopes of Exotic Matter
Groundbreaking results show that neutron stars of different masses may have the same size — upending astrophysical models.
How Maxwell’s Demon Continues to Startle Scientists
The thorny thought experiment has been turned into a real experiment — one that physicists use to probe the physics of information.
Long-Missing Midsize Black Hole Flashes Into View
Black holes seemed to come only in sizes small and XXL. A new search strategy has uncovered a black hole of “intermediate” mass, raising hopes of more to come.
New Kind of Space Explosion Reveals the Birth of a Black Hole
A supernova-like explosion dubbed the Camel appears to be the result of a newborn black hole eating a star from the inside out.
In Violation of Einstein, Black Holes Might Have ‘Hair’
A new study shows that extreme black holes could break the famous “no-hair” theorem, and in a way that we could detect.
‘Unicorn’ Discovery Points to a New Population of Black Holes
Small black holes were nowhere to be found, leading astronomers to wonder if they didn’t exist at all. Now a series of findings, including a “unicorn” black hole, has raised hopes of solving the decade-long mystery.