September 26, 2019 updates Posted on September 26, 2019June 28, 2020 by Doug Loss Exoplanet Habitability: Potential O2/O3 Biosignatures in the Ultraviolet https://link.springer.com/article/10.1134/S003809461905006X Spin-orbit coupling for close-in planets https://www.aanda.org/articles/aa/abs/2019/10/aa36336-19/aa36336-19.html Clues to Understanding the Microphysics of Dust in the Interstellar Comet C/2019 Q4 (Borisov) https://iopscience.iop.org/article/10.3847/2515-5172/ab46a6 Detection of Exoplanet as a Binary Source of Microlensing Events in WFIRST Survey https://arxiv.org/abs/1909.11559 A New Model Suite to Determine the Influence of Cosmic Rays on (Exo)planetary Atmospheric Biosignatures — Validation based on Modern Earth https://arxiv.org/abs/1909.11632