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.

Discovery of the second SiO maser in a “water fountain” star — one with outflows exceeding 100 km/s as traced by water masers — promises to determine the evolutionary stage of these rare stars.

Modeling of dwarf spheroidal galaxies in the Local Group shows how the star formation history and chemical evolution of a galaxy can be constrained with measurements of chemical abundance ratios.