Researchers report the discovery of the first millimeter-wavelength afterglow from a short gamma-ray burst and confirm the afterglow of another gamma-ray burst for which we have localized a position.

Active galactic nuclei in post-starburst galaxies are likely fed by the same processes that drive the transition from star forming to quiescent, and thus are likely to be “along for the ride” more than in the driver’s seat.

Hubble spectroscopy of four out of five targets of the Lucy mission reveals a near-ultraviolet feature that may be due to fine-grained deposits of iron, carbon, or graphite on the asteroids’ surfaces.

Analysis of the NASA–Jet Propulsion Laboratory fireball database finds that these exploding meteors often originate from comets and asteroids, and interstellar objects are a likelier source of these events than previously thought.

The first-ever global models of collapsars suggest that the neutron-rich flow necessary for the creation of r-process elements may be short lived, but models with full magnetohydrodynamics may find different results.

If present during the epoch of reionization, dark stars — hypothetical stars powered by the annihilation of dark matter — could provide an explanation for the observed optical depth of the cosmic microwave background.