Michael K. Shepard et al 2021 Planet. Sci. J. 2 125
A new shape model of asteroid 16 Psyche, built from observations spanning a wide range of wavelengths, predicts the asteroid’s overall radar albedo and suggests its upper meter of regolith has significant metal content.
Benjamin Boe et al 2021 ApJL 914 L39
The December 2020 solar eclipse provided the opportunity to study in detail a “double-bubble” coronal-mass-ejection structure as it erupted from the solar surface and extended out to over 5 solar radii.
Michael P. Busch et al 2021 ApJ 914 72
Extemely broad, faint OH emission has been discovered toward the outer region of the Milky Way, suggesting the presence of extremely diffuse, unseen molecular gas in the geometry of a thick disk in the outer galaxy.
Ava Polzin et al 2021 ApJL 914 L23
The serendipitously discovered COSMOS-dw1 is the first known example beyond the immediate vicinity of the Local Group of a dwarf galaxy that appears to have quenched in isolation.
Luboš Neslušan and Mária Hajduková 2021 AJ 162 20
New modeling suggests that the long-period comet C/1961 T1 (Seki) is the parent body of two meteor showers observed in Earth’s atmosphere: the December ρ-Virginids and the γ-Sagittariids.
Marc Rovira-Navarro et al 2021 Planet. Sci. J. 2 119
For a Mars-sized exomoon in a close, eccentric orbit around a gas giant planet, tidal heating can raise the surface temperatures to more than 400 K for 10 million yr, increasing the possibility of detection.