S. Bacholle et al 2021 ApJS 253 36
Mini-EUSO, a telescope observing the Earth from the ISS, will map the nighttime Earth in the ultraviolet, observing ultrahigh-energy cosmic rays, atmospheric phenomena, and sea bioluminescence from space.
Amy A. Simon et al 2021 Planet. Sci. J. 2 47
Hubble observations of Saturn in 2018–2020, just after the northern hemisphere summer solstice, track the small changes in clouds, haze, and winds, in contrast with larger swings associated with seasonal change.
Hollis B. Akins et al 2021 ApJ 909 139
New cosmological zoom-in simulations of Milky Way–mass halos show that many satellites with M* ~ 106−108 M⊙ quench within ~2 Gyr of infall into the host halo, while others remain star-forming for as long as 5 Gyr.
Jason Man Yin Woo et al 2021 ApJL 910 L16
Disk simulations exploring the overlap between accretion zones of planetesimal embryos suggest that the giant planets likely resided on more circular orbits during gas disk dissipation than they do today.
Nitika Yadlapalli et al 2021 ApJL 909 L27
Very Long Baseline Array interferometric observations of the galactic low-mass X-ray binary AT2019wey reveal a resolved source that is likely a compact steady jet with X-ray luminosity comparable to the accretion disk.
David Jewitt et al 2021 AJ 161 188
Models of the photometry of the incoming long-period comet C/2017 K2 show that dust production beginning at distances of ~35 au from the Sun — Kuiper-belt distances — is needed to match observations.