Nearby galaxy Messier 81 might be home to not just one but two supermassive black holes that are locked in a binary system with an orbital period of 30 years.

Using the first publicly available data from the Daniel K. Inouye Solar Telescope, researchers study how magnetic fields are threaded and connected from the photosphere to the corona.

JWST observations of quiescent (i.e., not actively star-forming) galaxies ~1–2 billion years after the Big Bang show that the size evolution of these galaxies is more complicated than previously thought.

Extraterrestrial civilizations may synchronize their signals with a major cosmic event, like the supernova SN 1987A; a recent search found no anomalous signals from likely targets.

More than half of the Milky Way gamma-ray sources in a recent catalog are unidentified; new X-ray observations reveal that many of the unidentified sources are pulsars.

Leveraging data taken over years or decades, researchers have confirmed the planetary nature of several giant exoplanets with orbits longer than 100 days; other planets surveyed turned out not to be planets at all.