Galaxies containing two stellar disk components rotating in opposite directions appear not to have a single cause; the gas that creates the counterrotating component can come from mergers or accretion.

Ground-based imaging shows how individual volcanic plumes interact as they are deposited on Io’s surface, creating measurable changes on this dynamic moon.

A newly discovered dense molecular ring in a young, cold star forming region gives a detailed glimpse into the inner workings of the regions in which massive stars form.

Though nearly all high-mass galaxies harbor massive central black holes, the black hole occupation fraction decreases to 66% for middling galaxies and just 33% for dwarf galaxies.

Optical, ultraviolet, and X-ray observations may provide the key needed to link quasi-periodic oscillations in jets to Lense–Thirring precession of the accretion flow in a Seyfert galaxy.

Simulations suggest that JWST’s Near-Infrared Camera should be able to detect ring systems around exoplanets, provided that the rings stretch to substantially larger radii than that of Saturn’s A ring.