P. Bennet et al 2020 ApJL 893 L9
Deep Hubble imaging of four faint and ultra-faint dwarf galaxy candidates in the vicinity of M101 show that they are background galaxies, verifying that M101 is very poor in satellites in comparison to the Milky Way and M31.
Kevin J. Zahnle et al 2020 Planet. Sci. J. 1 11
The highly reduced early atmosphere of Earth necessary for the origin of life may have been made possible by the “late veneer” — material accreted by Earth after the Moon-forming impact.
Paula Szkody et al 2020 AJ 159 198
The first year of testing and operation of the Zwicky Transient Facility has revealed 329 objects as known or candidate cataclysmic variables, with nearly half of the strong candidates lying within 10 degrees of the galactic plane.
Brett M. Morris 2020 ApJ 893 67
Space-based photometry of F, G, and K stars aged from 10 Myr to 4 Gyr reveal typical starspot coverages in the range of 1%–10%, with decreasing coverage occurring with increasing stellar age.
M. Tavani et al 2020 ApJL 893 L42
X-ray and γ-ray observations of the periodic repeating fast radio burst FRB 180916 obtained by AGILE and Swift place stringent upper limits on high-energy emission, constraining the source mechanism.
Michael H. Wong et al 2020 ApJS 247 58
High spatial resolution images of Jupiter were captured by Hubble in 2016 to complement data taken by the Juno spacecraft during perijove passes, providing insight into a variety of observed atmospheric phenomena.