Edward Ashton et al 2021 Planet. Sci. J. 2 158
Observations of 120 objects in eccentric, inclined orbits around Saturn suggest that one or more collisions occurred a few hundred million years ago among Saturn’s population of retrograde-orbiting moons.
Jihye Hong et al 2021 AJ 162 93
Near-infrared spectra of two planetary nebula candidates in close lines of sight toward the galactic center indicate that these are the first confirmed planetary nebula objects in the nuclear stellar disk.
Mark Popinchalk et al 2021 ApJ 916 77
Analysis of more than 700 stars indicates that the age of transition for M dwarfs from rapid to slow rotation in clusters depends on spectral type, with later spectral types transitioning at older ages.
T. M. C. Abbott et al 2021 ApJS 255 20
The 2nd public data release of the Dark Energy Survey, assembled from 6 years of optical and near-infrared imaging, constitutes the largest photometric data set to date at the achieved depth and photometric precision.
Elisabeth R. Adams et al 2021 Planet. Sci. J. 2 152
New analysis of 74 candidate ultra-short-period planets in K2 data reveal a large fraction in multiplanet systems, supporting origin models that involve dynamical interactions with exterior planets.
Ananthan Karunakaran et al 2021 ApJL 916 L19
Cosmological simulations predict a larger number and fraction of quenched satellite galaxies below a stellar mass of 108 M⊙ than are observed in SAGA-II data, a catalog of Milky Way satellite analogs.