April 23, 2021 updates Posted on April 23, 2021 by Doug Loss Formation of Earth-sized planets within the Kepler-1647 System Habitable Zone https://academic.oup.com/mnras/advance-article-abstract/doi/10.1093/mnras/stab1165/6247605 Color Classification of Earth-like Planets with Machine Learning https://academic.oup.com/mnras/advance-article-abstract/doi/10.1093/mnras/stab1144/6247611 First Space Colony: What Political System Could We Expect? https://www.sciencedirect.com/science/article/abs/pii/S0265964621000187 HST PanCET Program: A Complete Near-UV to Infrared Transmission Spectrum for the Hot Jupiter WASP-79b https://arxiv.org/abs/2104.10688 On the reliability of simulations of collisional stellar systems https://arxiv.org/abs/2104.10843 Chemical composition of stars with massive planets https://arxiv.org/abs/2104.10894