Particle-in-cell and magnetohydrodynamic simulations provide a way to understand the physical processes at play when a shock interacts with a dense clump of plasma — a potential way to accelerate cosmic rays.

A theoretical framework for a series of laboratory experiments would leverage existing high-power lasers to study supersonic radiation-dominated waves relevant to high-energy astrophysical systems.

Searches for light black holes — those with masses of 1–2 solar masses — may provide a way to support or dismiss the existence of primordial black holes in the asteroid–Moon mass range in dark matter halos.

A search for extraterrestrial signals from the gravitational foci of nearby stars comes up short, but insights gleaned from the effort will help place constraints on future searches.

Calculations suggest that the waves in the rings of Uranus and Neptune can help focus our understanding of these planets’ interiors, but an orbiting spacecraft is likely necessary to make these measurements.

Planetary systems containing a small, close-in planet are more likely to also host a distant gas giant than other systems, but less likely to host a massive giant planet orbiting at a distance of 0.3–3 au.