Accounting for relativistic effects and thermal electrons dramatically alters the derived parameters of high-velocity shocks, recent research shows.
Analysis of radioactive isotopes suggests that the Sun was born in association with a 25-solar-mass star that exploded as a supernova just under 1 million years before the first solids of the solar system formed.
Modeling of a transitional protoplanetary disk finds a best fit to the data for a disk containing an unresolved planet or brown dwarf that moved between 2018 and 2021.
Spectroscopy of four small asteroids suggests that these objects, as well as the small Jupiter Trojan Polymele, belong to a previously unrecognized group of Trojans that may be the product of recent disruptions.
A new all-sky catalog presents the positions and estimates of correlated flux density for 21,942 radio sources, with preferential inclusion of active galactic nuclei currently exhibiting strong synchrotron emission.
Three-dimensional hydrodynamical modeling of the supernova SN 2014C suggests that the progenitor star lost 2.5 solar masses of material during the period from 5000 to 1000 years before the explosion.