A survey has discovered 34 giant radio sources — active galactic nuclei with projected linear sizes larger than about 2.2 million light-years — and reported on their multi-wavelength properties.

Active galactic nucleus hosts that have outflows tend to have higher star formation rates, later morphological types, and no evidence of quenching of star formation, among other characteristics.

A proposed future version of the Event Horizon Telescope may be able to detect the polarization reversal indicative of the presence of a black hole photon ring at a signal-to-noise ratio of 2–3.

Modeling suggests that SN 2022pul and other “SN 03fg-like” supernovae result from the merger of two white dwarfs, specifically the “violent merger” scenario that disrupts one white dwarf and detonates the other.

In preparation for the Uranus Orbiter Probe mission, researchers have used a protoplanetary disk model to estimate the likely compositions of Uranus and Neptune.

A field test showed the capabilities and limitations of rover-based and helicopter-based missions, with rovers excelling at detailed analyses and helicopters taking the lead on mapping operations.