Samuel M. Howell 2021 Planet. Sci. J. 2 129
New modeling of Jupiter’s moon Europa predicts that its outer icy shell is ~23–47 km, providing useful estimates for future space missions and interesting implications for the physical processes on icy satellite surfaces.
Terese T. Hansen et al 2021 ApJ 915 103
Abundance analysis of Indus_0, a star in the Indus stellar stream, is consistent with globular cluster star properties, providing the first chemical evidence of a fully disrupted dwarf galaxy containing a globular cluster.
Miguel R. Alarcon et al 2021 AJ 162 25
During the 2018 solar minimum, 11 million zenithal night sky brightness data points were collected at different dark sites around the planet, cataloging the natural causes of short-term variations in night sky brightness.
Myriam Benisty et al 2021 ApJL 916 L2
New ALMA observations reveal a circumplanetary disk around the protoplanet PDS 70 c spatially separated from the circumstellar disk and less extended than ~1.2 au in radius.
Jiayin Dong et al 2021 ApJS 255 6
A systematic search for warm Jupiter candidates — planets of more than 6 Earth radii with orbital periods of 8–200 days — around bright TESS main-sequence host stars produces a catalog of 55 candidates.
Mohamad Abbas et al 2021 ApJ 915 49
24 RR Lyrae stars are identified that might have escaped from seven globular clusters orbiting the Milky Way: Palomar 13 (Pal 13), NGC 6341 (M92), NGC 5904 (M5), NGC 5466, NGC 1261, NGC 288, and NGC 1851.