Astrophysics

New measurements could upend the standard theory of the cosmos that has reigned since the discovery of dark energy 21 years ago.

For the first time, researchers have created a scale model of the twisting loops of the sun’s magnetic field.

Tiny, dim “dwarf” galaxies have been found to hide gas-spewing black holes.

After an interstellar asteroid shot past the sun, scientists realized that there’s probably a lot of itinerant rocks out there.

The sun radiates far more high-frequency light than expected, raising questions about unknown features of the sun’s magnetic field and the possibility of even more exotic physics.

A strange glow coming from the Milky Way’s center was thought to be due to ordinary pulsars. But a new look at a years-old study shows that dark matter might still be responsible.

Jim Gunn shaped the theory of the evolution of the cosmos before building cameras and spectrographs for major observatories like the Hubble Space Telescope.

The astrophysicist Janna Levin reflects on the newly unveiled, first-ever photograph of a black hole.

The latest AI algorithms are probing the evolution of galaxies, calculating quantum wave functions, discovering new chemical compounds and more. Is there anything that scientists do that can’t be automated?