Reported diameters of dust devils on Mars appear to follow a simple power-law distribution; dust devil diameters are important because the amount of dust injected into the atmosphere scales with the diameter.
A vertical velocity anomaly in the stellar disk of the Milky Way and spatially coincident gaseous disturbances support the hypothesis that a dark or failed ultra-compact dwarf galaxy has passed through the Milky Way.
A newly discovered faint nebula surrounding a cataclysmic variable star could either be the remnant of a nova outburst from several centuries ago or a long-ago planetary nebula; it’s not yet possible to say which.
Observations of a free-floating black hole could discern between accretion modes; the magnetically arrested disk mode may result in detectable emission, while a radiatively inefficient accretion flow may not.
A comparison of polycyclic aromatic hydrocarbon emission in low- and high-metallicity environments suggests that the growth of these molecules is inhibited in low-metallicity environments, resulting in lower emission.
The supernova remnant SN 1006 shows a high degree of X-ray polarization, and the degree of polarization varies with location; the polarization is lower where the shell is thought to interact with an interstellar cloud.