A new look at a nearby M-dwarf star neither confirms nor refutes the existence of a close-in companion, but it does rule out the possibility that the companion has a mass greater than four Jupiter masses, if it exists.
JWST observations of faint galaxies in the early universe help to constrain how the process of stellar feedback — the heating and disruption of the interstellar medium — affects the formation of new stars.
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.