Takashi Tsukagoshi et al 2016 ApJ 829 L35

~3-AU resolution imaging of the protoplanetary disk around TW Hya with ALMA indicates a deficit of mm-sized grains within the most prominent gap at 22 AU, suggesting an unseen planet has cleared it.

W. B. Sparks et al 2016 ApJ 829 121

HST far-UV direct images of Europa, taken as the moon transited Jupiter’s face, were used to measure absorption from gas or aerosols beyond the Europa limb. Possible signs of plume activity were detected.

Calen B. Henderson and Yossi Shvartzvald 2016 AJ 152 96

Calculations show WFIRST should be able to detect and characterize the masses of free-floating planets down to or below super-Earths throughout the Galaxy during its entire microlensing survey.

Mark Stakhiv et al 2016 ApJ 829 117

Observations from the Advanced Composition Explorer spacecraft suggest the fast solar wind originates from coronal holes, and the slow solar wind has a component originating from closed magnetic loops.

Ben W. P. Lew et al 2016 ApJ 829 L32

HST/WFC3 observations of the cloud structure of a 20-Jupiter-mass, extremely red brown dwarf suggest a possible connection between dusty atmospheres and high-amplitude variability of dwarfs.

Brian E. Wood et al 2016 ApJ 829 74

Ultraviolet spectroscopic observations of red giant atmospheres by HST support a model in which the termination shocks of red gians are radiative shocks, rather than simple hydrodynamic shocks.