T he first time I heard about galaxies without dark matter, I was sitting in my very first graduate class at the University of São Paulo. It was 2018, and the discovery had just ...

It’s a reasonable argument (even if unproven), but it feeds directly into a far less reasonable, age-old “What’s the matter with kids today?” narrative that delights unscrupulous headline writers as ...

The research could shed light on how black holes vomit out matter and how this influences their home galaxies.

Astronomers have identified a strange new kind of exoplanet that challenges how scientists classify worlds beyond our Solar System. The planet, L 98-59 d, appears to contain a vast ocean of molten ...