K. Sárneczky et al 2016 AJ 152 220
A decade-long survey of the activity of 50 long-period comets in our solar system shows that dynamically new comets have a higher level of activity and develop more symmetric comae.
V. Strazzullo et al 2016 ApJL 833 L20
HST images of the low-mass cluster Cl J1449+0856, likely a typical progenitor of an average massive cluster today, show a red population in the core that is a mixture of quiescent and dusty star-forming galaxies.
Rubab Khan 2017 ApJS 228 5
Spitzer infrared catalogs of stars are presented for nearby, mostly large star-forming galaxies — including 859,000 sources in Andromeda galaxy (M31) and 116,000 sources in another 15 galaxies.
Julien de Wit et al 2017 ApJL 836 L17
Spitzer observations show that the planet and star in HAT-P-2’s eccentric system interact. Measured pulsations of the star appear to be induced by the tidal pull of the planet’s orbit.
R. O. Chancia and M. M. Hedman 2016 AJ 152 211
Voyager 2 images of Uranus’s α and β rings show patterns that may be wakes from small moonlets orbiting exterior to the rings. The moonlets’ estimated sizes are too small to resolve in the images, however.
B. Luo et al 2017 ApJS 228 2
An X-ray catalog of over 1000 sources is presented for the ~7 million second exposure of the Chandra Deep Field-South, which covers a total area of 484.2 square arcmin at unprecedented X-ray sensitivity.