May 10,2021 updates Posted on May 10, 2021 by Doug Loss Why Are We Here?: Constraining the Milky Way’s Galactic Habitable Zone https://academiccommons.columbia.edu/doi/10.7916/d8-60np-j341 Exocometary Activity Around Stars at Different Evolutionary Stages: Current Issues https://link.springer.com/article/10.3103/S0884591321020057 Light sail boosted by instantaneous radiation pressure https://link.springer.com/article/10.1140/epjp/s13360-021-01357-4 Time-domain Modulation of HD 189733 Activities by Its Planet https://iopscience.iop.org/article/10.3847/1538-3881/abf55d An upper limit for the growth of inner planets? https://arxiv.org/abs/2105.02907 Estimating Ion Escape from Unmagnetized Planets https://arxiv.org/abs/2105.03174 Looking for astrometric signals below 20 m/s: A candidate exo-Jupiter in δ Pav https://arxiv.org/abs/2105.03244 Feasibility of Detecting Interstellar Panspermia in Astrophysical Environments https://arxiv.org/abs/2105.03295