Breakthrough Propulsion Study
https://www.centauri-dreams.org/2019/02/15/breakthrough-propulsion-study/
Stellar spectroscopy in the near-infrared with a laser frequency comb
https://www.osapublishing.org/optica/abstract.cfm?uri=optica-6-2-233
Multiverse Predictions for Habitability: Number of Habitable Planets
https://arxiv.org/abs/1902.06784
Tropical and Extratropical General Circulation with a Meridional Reversed Temperature Gradient as Expected in a High Obliquity Planet
https://arxiv.org/abs/1902.06832
PDS 70: A transition disk sculpted by a single planet
https://arxiv.org/abs/1902.07191