New work shows how the total free magnetic energy, the length of the polarity inversion line, and other factors can predict whether a solar active region will generate a C-, M-, or X-class solar flare.

Researchers measured 75 spectral lines from 19 different molecules in the spectrum of CW Leonis, an asymptotic giant branch star that is rich in carbon and surrounded by a sooty cloud.

An ongoing survey of massive galaxy clusters has obtained extremely deep infrared observations that will provide a strong constraint on galaxy formation models.

Bar lanes channel gas toward the center of the Milky Way, and some of the gas may overshoot the center of the galaxy and collide with the other bar lane rather than accreting onto the galactic center.

A newly discovered brown dwarf in orbit around a subgiant star provides a valuable opportunity to understand how the process of stellar evolution impacts the properties of a sub-stellar companion.

Boulder fields were once thought to be a universal indicator of the presence of wrinkle ridges from tectonic activity, but new research suggests that some wrinkle ridges lack the tell-tale boulder fields.