More than 80 signals originating from the mergers of compact objects like neutron stars and black holes can be found in the catalog of gravitational-wave events seen by multiple detectors.
A survey of 30 supernovae for which spectra were acquired less than two days after the explosion suggests that short-lived, narrow emission lines are common, occurring in more than a third of cases.
The warm, Saturn-size planet TOI-199 b is the first of its class for which we have precise mass and radius measurements, thanks to the Antarctica Search for Transiting ExoPlanets.
The length-based classification scheme of gamma-ray bursts came under strain when a long (i.e., collapsar-based) gamma-ray burst was found to accompany colliding neutron stars.
The complex rotation of the first interstellar object discovered traversing our solar system continues to inspire research; this work investigates the impact of outgassing from the object’s sub-stellar point.
The longest long-duration gamma-ray bursts may be a good place to look for gas rich in r-process elements: elements that are made in hot, dense environments by the rapid capture of neutrons.