Researchers report the first measurement of the deuterium-to-hydrogen ratio in a substellar object outside the solar system; this measurement suggests a mass of less than 12 Jupiter masses for the object.

Using two decades of data from a variety of instruments, researchers examined the behavior of an X-ray binary system, finding a clear 244-day period as well as outbursts during certain orbital phases.

Two star clusters near the Orion star-forming complex have ages around 8.9 million years and appear to have formed via the coalescence of multiple subclusters from the same molecular cloud.

Simulations show that the gravity science experiment of the Venus Emissivity, Radio Science, InSAR, Topography and Spectroscopy (VERITAS) mission will be capable of achieving the mission’s stated science goals.

Hydrodynamical simulations tackle the problem of neutron-star glitches, which are presumed to originate at the star’s crust before transferring momentum to the star’s core.

In February 2024, the Einstein Probe spotted an X-ray flare that was later linked to a gamma-ray burst that had been observed by the Fermi Gamma-ray Burst Monitor but did not trigger an alert.