The presence of starspots may confound the determination of stellar properties from optical and infrared spectroscopy, but overall the effect is larger for optical spectra than for infrared spectra.
Astronomers have used a neural network to produce a catalog of 57,136 distant candidate regions with extremely high neutral hydrogen column densities, which are key to understanding galaxy formation.
Reconfiguration of magnetic fields very early in the history of the universe may provide an answer as to why early universe lithium abundances were so low and deuterium abundances were unexpectedly high.
“Single” pulsating subdwarf AQ Col may not be flying solo after all — radial velocity and photometric observations suggest that the star has two white dwarf or neutron star companions.
A team presents a feasibility study of a ring-skimming spacecraft that could characterize Saturn’s rings and inner moons, opening up opportunities to study the formation of the inner Saturnian system.
New observations of an ultra-hot Jupiter provide useful constraints on atmospheric models of planets that orbit so close to their parent stars that they have a permanent scorching day side and cooler night side.