The disks surrounding accreting black holes are dense enough for plasma physics effects to be important; new research shows that disks can produce strong iron emission, potentially explaining certain observations.
A new catalog uses deep Hubble Space Telescope data of four Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) fields to provide redshift estimates and physical properties for more than 150,000 galaxies.
A supernova at a distance of 163 light-years from a planetary system can eject half of all objects less than 1 cm; nearer supernovae can remove objects up to 100 meters in size.
A wide-reaching meta-analysis of coronal magnetic field models finds that all of models studied fail to reproduce the boundaries of coronal holes seen in extreme-ultraviolet images.
An analysis of X-ray data from the Chandra X-ray Observatory suggests that “little red dot” galaxies do harbor active galactic nuclei, though the properties of these objects differ from other active galactic nuclei.
Briny water formed during the impact of an icy body on an airless moon should remain liquid long enough to form curved gullies, but pure water likely freezes too quickly to do so.