Kei E. I. Tanaka et al 2020 ApJL 900 L2
ALMA observations of a proto-binary system reveal salt, hot water, and silicon compounds in the individual protostellar disks at ~100 au; these “hot-disk” lines may be common in innermost disks around massive protostars.
Michael F. Heslar et al 2020 Planet. Sci. J. 1 35
Cassini observations of sun glitter reveal rough sea surfaces around Kraken Mare on Titan, indicating wave activity driven by the winds and tidal currents during northern summer on this Saturnian satellite.
Chang Liu et al 2020 ApJ 899 92
Sgr A*, the supermassive black hole in our galaxy’s center, likely had active gas-accretion phases in its past, producing X-ray outbursts that could have significantly enhanced the abundances of some molecular species in our galaxy.
Mariona Badenas-Agusti et al 2020 AJ 160 113
Three sub-Neptune-sized planets have been found transiting the nearby and bright Sun-like star HD 191939, providing a valuable target for follow-up observations to precisely measure the planet masses and atmospheres.
Jenny M. Rodríguez Gómez et al 2020 ApJ 899 47
Analysis of coronal mass ejections (CMEs) during solar cycles 23 and 24 indicate that 62% of fast CMEs are isolated events at solar minimum, whereas 50% occur in clusters of 2 or more during solar maximum.
Amir Siraj and Abraham Loeb 2020 ApJL 899 L24
An equal-mass, temporary binary companion to the Sun in the solar birth cluster at a separation of ~1,000 au could have formed the observed population of outer Oort Cloud objects and captured the hypothetical Planet Nine.