Simulations predict that ice-rich planets in the range of 5–15 Earth masses likely have mixed ice–rock cores, but substantial mass loss can extract the ice from the core, leading to generation of a tenuous atmosphere.

A new solar radio telescope operating at 35–40 gigahertz promises to widen the frequency range in which we can observe solar microwave bursts and other explosive events in solar cycle 25.

Thermodynamic modeling of the evolution of Ceres’s mantle is able to reproduce the densities inferred from Dawn observations and may also provide an explanation for the salty deposits seen on the dwarf planet’s crust.

The open flux problem, in which models of the Sun’s magnetic field underpredict the number of field lines that extend into the solar system, might be solved by correcting for a saturated spectral line of iron.

First results from a study of the structures that trace the spiral arms of our galaxy show that magnetic fields tend to be perpendicular to the center of the structure in regions of active star formation, but more random elsewhere.

A new technique resolves some of the difficulty of determining the ratios of stars in binary systems within star clusters, finding that 54–70% of stars in the Pleiades cluster belong to a binary pair.