After three decades of searching without success, researchers have at last detected emission from molecular gas — carbon monoxide, specifically — in the largest spiral galaxy known.

Data for 4,726 galaxies with redshifts between 0.6 and 1 allow for a determination of the ultraviolet luminosity function, which illuminates the sources of ionizing radiation during that period of the universe’s history.

An analysis of 40,000 red supergiant stars and asymptotic giant branch stars in the Large and Small Magellanic Clouds provides valuable information on the dust production rates of these galaxies.

Particles likely inhabited polar orbits around the newborn Earth–Moon system until the two bodies were separated by roughly 10 Earth radii; at that point, as is the case today, stable polar orbits no longer existed.

Observations with the Keck Cosmic Web Imager spectrograph reveal that the ejected material of the unusual supernova remnant Pa 30 is moving at velocities close to the free-expansion velocity.

By carefully monitoring and taking spectra of artificial objects orbiting Earth, researchers have shown how easily some of these objects might be confused for natural objects like asteroids.