Modeling of shocks observed by spacecraft suggests that high-energy electrons tend to be accelerated by the shock itself, while low-energy electrons are accelerated by a mixture of processes centered on the solar flare.

Irradiating silicon- and carbon-rich dust grains with X-rays shows that these grains are likely destroyed on timescales of a few million years on the surfaces of protoplanetary disks, but could survive far longer in the disk midplane.

A new survey uses a 100-meter radio telescope to measure the ammonia emission arising from 97 dense gas clumps in order to characterize the physical properties of these potential sites of star formation.

Merging galaxy cluster A2108 appears to be associated with a diffuse radio source known as a relic — one of just a few examples of such an observational signature associated with a low-mass merger.

Transmission spectroscopy may be able to identify exoplanets that form in the debris disks surrounding white dwarfs — a class of planets hypothesized to exist but not yet observed.

Observations of a comet on its closest approach to Earth in 2017 reveal gas and dust structures, changes in the jet direction for different chemical species, and a feature that repeats every 7.6 hours.