Nicole C. Shibley and Gregory Laughlin 2021 Planet. Sci. J. 2 221
The behavior of Europa’s intermittent water-vapor geysers might be explained by release of carbon dioxide gas, which can launch ejecta 200 km above the icy moon’s surface, where it persists for ~10 minutes.
Bharti Arora et al 2021 AJ 162 257
Just 12 years to go: observations around the year 2034 should resolve the remaining uncertainty about the orbital parameters of WR 125 — a Wolf-Rayet star that is known to periodically produce dust and undergo dimming.
Minghao Yue et al 2021 ApJL 921 L27
Quasar pair candidate J2037–4537 is likely a bona fide quasar pair — allowing for the first constraint on the quasar pair fraction at z>5 — due to the distinct spectral features of the two images and the lack of a lensing galaxy.
Attempts to pin down the magnetic field of a stealth coronal mass ejection — an eruption of solar plasma that isn’t associated with an obvious source region on the Sun — show promising agreement between models and data.
The expanded capabilities of GR-Athena++ enable the stable, numerical solution of the key equations of Einstein’s general theory of relativity, which allows for detailed studies of merging black hole binaries.
Winds from a super star cluster may be responsible for the faint and broad emission-line wings seen in the H II region Markarian 71 — and this type of emission feature may be characteristic of radiatively driven winds in general.