What's up in
A problem confronts cosmology: Two independent measurements of the universe’s expansion give incompatible answers. Now a third method, advanced by an astronomy pioneer, appears to bridge the divide.
A recent neutron star merger has defied astronomers’ expectations, leading them to question longstanding ideas about neutron stars and the supernovas that create them. “We have to go back to the drawing board.”
By watching for a special kind of flare, astronomers have identified the fingerprints of an Earth-size planet orbiting a distant star.
After a space telescope disintegrated, astrophysicists had little hope of understanding how supermassive black holes agitate giant galaxies. Then they invented a hack.
Most every cosmologist believes the universe is flat. A new analysis argues that it’s closed.
Get highlights of the most important news delivered to your email inbox