A. N. Heinze et al 2021 Planet. Sci. J. 2 12
New estimates of the the total population of near-Earth objects in the solar system are ~372,000 objects of ~34-m diameter and ~15,900,000 objects of ~10-m diameter.
Yao-Yuan Mao et al 2021 ApJ 907 85
Stage II of the SAGA survey has expanded the catalog of satellites of Milky Way analog galaxies to 127 satellites around 36 analogs. The number and luminosities of Milky-Way satellites are consistent with SAGA systems.
Elisabeth R. Newton et al 2021 AJ 161 65
The newly discovered young planetary system TOI 451 includes three validated planets at periods of 1.9, 9.2, and 16 days, providing the opportunity to study planetary atmospheres that may still be in the process of evolving.
Alex B. Akins et al 2021 ApJL 907 L27
A reassessment of data sets derived from ALMA observations of Venus demonstrates that the phosphine feature cannot be identified following calibration revisions in the data, suggesting more observations are needed.
Yi Ren et al 2021 ApJ 907 18
An attempt to establish a complete sample of red supergiants in galaxies M31 and M33 has resulted in a catalog of 5,498 and 3,055 red supergiants in the two galaxies, respectively.
D. Tanoglidis et al 2021 ApJS 252 18
23,790 extended low-surface-brightness galaxies identified in ~5,000 sq. deg from the first 3 years of Dark Energy Survey imaging can be used to test the role of environment in faint galaxy formation and evolution.