I. Oteo et al 2018 ApJ 856 72

10 dusty star-forming galaxies are found in the core of an extreme protocluster of galaxies in the early universe. Their star formation rate is considerably higher than those seen before in any z > 4 protocluster.

Eric L. Sandquist et al 2018 AJ 155 152

K2 observations of a main-sequence binary system in the old open cluster M67 suggest that this was once a primordial triple system. Two of the stars in the system merged ~1 Gyr ago, producing the unusual binary.

Zhenlin Zhu et al 2018 ApJS 235 26

14 years of Chandra data are used to create an updated catalog of X-ray point sources in the inner 500” (~20 pc) of our galactic center, including 3,619 sources, ~1,500 of which are new.

Lars A. Buchhave et al 2018 ApJ 856 37

Stars hosting Jupiter analogs have an average metallicity close to solar, in contrast to their counterparts hosting hot Jupiters and eccentric cool Jupiters, which have super-solar metallicities.

Chao He et al 2018 ApJL 856 L3

Experimental laboratory investigations of photochemical haze formation indicate that atmospheric temperature and metallicity strongly affect particle color and size, thus altering the particles’ optical properties.

Amy A. Simon et al 2018 AJ 155 151

Observations of Jupiter’s Great Red Spot over 150 reveal its gradual shrinking, an increase in its westward drift rate, and a decrease in its short-wavelength reflectance and north–south color asymmetry.