Meet S/2023 U1, S/2021 N1, and S/2002 N5: these newly discovered moons of Uranus and Neptune are just 7, 14, and 23 kilometers across, respectively.

Collisions between stars can produce transient signals similar in brightness to supernovae; new analytic and hydrodynamic modeling examines the properties of these events.

Measurements of galactic half-light radii at different wavelengths, combined with an investigation of simulated galaxies, suggest that dust rather than inside-out growth is responsible for observed trends.

A first-of-its kind numerical analysis demonstrates that radio and X-ray precursor emission is generated by Alfvén waves in the magnetosphere of a neutron star in a close binary system.

An analysis of 57 nearby Sun-like stars shows that roughly half of these systems have habitable zones subjected to X-ray fluxes equal to or less than that of the Sun, making them promising locations for habitable planets.

Simulations show that uncertainties in the properties of atomic nuclei result in a factor of a few spread in the outcomes of element creation in a black hole accretion disk, highlighting the need for experimental data.