Jiansen He et al 2021 ApJ 910 7
The Parker Solar Probe can be used to explore small bodies it passes, like the comet-like object 322P/SOHO, which swept by the probe on 2019 September 2 at a relative distance as close as 0.025 au.
Konstantin Batygin and Michael E. Brown 2021 ApJL 910 L20
New modeling of the impact of a hypothetical Planet Nine on solar system bodies suggests that observed long-period trans-Neptunian objects could include a mixture of Oort cloud and Kuiper Belt objects.
Yuxi (Lucy) Lu et al 2021 AJ 161 189
From rotation and kinematic properties, the ages of 29,949 Kepler F, G, K, and M dwarfs are estimated, providing insight into the evolution of low-mass stars on the main sequence.
Logan A. Pearce et al 2021 ApJ 909 216
Keck/NIRC2 imaging has uncovered a binary companion for the enigmatically dimming source KIC 8462852, a.k.a. Boyajian’s Star, which lies at a wide separation of 880 au.
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.