Strange times for 1ES 1927+654: This nearby active galactic nucleus pumps out more energy in soft (low-energy) X-rays than in hard (high-energy) X-rays or ultraviolet light and exhibits unusual variability.
Researchers report results from the digitized drawings and personal notebooks of a prominent 19th-century Italian scientist who observed the Sun for more than 25 years.
New simulations examine the prospect of forming heavy elements via rapid capture of neutrons in the hot outflows of proton-neutron stars that form after a supernova explosion or neutron star merger.
The globular cluster that houses a repeating fast radio burst may have a moderately high stellar encounter rate, which allows the possibility that the burst source formed dynamically but does not rule out other possibilities.
The upcoming survey to be conducted with the Rubin Observatory will detect between 0 and 70 interstellar asteroids each year, calculations suggest.
A substantial fraction of Type II supernovae arise from stars in binary systems, and studying the surrounding population of stars is a powerful way to gauge the likely age and mass of a supernova progenitor star.