Alan Dressler et al 2018 ApJ 869 152

Late Bloomer galaxies — massive galaxies at z < 1 that formed the majority of their stars within ~2 Gyr of the epoch of observation — account for ~20% of z ~ 0.6 galaxies with masses of the modern Milky Way.

Javier Peralta et al 2018 ApJS 239 29

A combination of different wind speed measurements for Venus suggest zonal variability possibly associated with solar tides, and variations of up to 30 m/s in the winds at the nightside lower clouds of Venus.

Adrian S. Hamers and Simon F. Portegies Zwart 2018 ApJL 869 L27

The observed characteristics of the Kepler 1625 system can be explained by the tidal capture of a secondary, Neptune-like planet in the young system that was turned into a moon by its capture.

Meghin E. Spencer et al 2018 AJ 156 257

The binary fractions in Draco and Ursa Minor (~50% and ~78%) suggest that the binary fraction might be larger in dwarf spheroidal galaxies that formed their stars quickly and/or have high velocity dispersions.

Gina E. Duggan et al 2018 ApJ 869 50

Measurements of barium abundances in dwarf galaxies indicate that neutron-star mergers are the most likely source of r-process element production in dwarf galaxies at early times.

Christopher Spalding 2018 ApJL 869 L17

Models demonstrate that leftover debris interior to Mercury’s current orbit could have been driven outward by the early solar wind, clearing this region and providing material for terrestrial planets and asteroids.