The simulated satellite galaxy distribution generally does a poor job of tracing the mean density of the host galaxy, but the degree of agreement between the two quantities is dependent upon the color of the host galaxy.

Observations reveal one of the fastest jets ever detected from a planetary nebula as well as variability that is likely associated with the presence of a low-mass binary companion to the central star.

Models of marine life suggest that tilted planets may have more oxygen available, with the amount of available biospheric oxygen doubling when the tilt is increased from 0 to 45 degrees.

The discovery of a planet orbiting interior to the orbit of a previously discovered hot Jupiter casts uncertainty on the formation mechanism for the outer planet, as high-eccentricity migration is now considered unlikely.

Researchers use a mass-loss model to assess binary systems in which mass transfer plays a large role — experiencing so-called common envelope evolution — and apply their results to 142 binary systems.

Researchers provide a tabulation of an analytical form of the Braginskii model, which, among other features, makes dealing with fluids composed of multiple species more tractable.