December 9, 2019 updates Posted on December 9, 2019June 28, 2020 by Doug Loss How to Find an Interstellar Comet: A Q&A with Discoverer Gennady Borisov https://www.space.com/interstellar-comet-borisov-discoverer-interview-gennady-borisov.html The Trans-Neptunian Solar System (Chapters 15 and 16) https://www.sciencedirect.com/book/9780128164907/the-trans-neptunian-solar-system Stellar engines: Design considerations for maximizing acceleration https://www.sciencedirect.com/science/article/abs/pii/S0094576519312457 XO-7 b: A transiting hot Jupiter with a massive companion on a wide orbit https://arxiv.org/abs/1912.02821 Habitable Age Instead of Location for Terrestrial Worlds https://arxiv.org/abs/1912.02862