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.
Using the interferometric capabilities of the Canadian Hydrogen Intensity Mapping Experiment, astronomers have localized a seemingly non-repeating fast radio burst to a galaxy just 130 million light-years away.
Researchers describe the current state of knowledge regarding Europa’s plumes and the Europa Clipper search strategy, which involves an initial global search that will be used to guide later observations.