December 21, 2020 updates Posted on December 21, 2020 by Doug Loss Planetary Diversity: Rocky planet processes and their observational signatures https://iopscience.iop.org/book/978-0-7503-2140-2 Warp Drive and the Kardashev Scale: Our Competence of Travelling Faster than Light https://www.researchgate.net/publication/344848513_Warp_Drive_and_the_Kardashev_Scale_Our_Competence_of_Travelling_Faster_than_Light When Is Life a Viable Hypothesis? The Case of Venusian Phosphine https://liebertpub.com/doi/10.1089/ast.2020.2390 Breakthrough Propulsion Study — Assessing Interstellar Challenges and Prospects https://jbis.org.uk/paper/2020.73.427 Technological Challenges in Low-Mass Interstellar Probe Communication https://jbis.org.uk/paper/2020.73.438 Survivability of Metallic Shields for Relativistic Spacecraft https://jbis.org.uk/paper/2020.73.446 Interstellar Material within the Solar System https://jbis.org.uk/paper/2020.73.457 Ephemeris Refinement of the Exoplanet Candidate around the White Dwarf WD1856+534 https://iopscience.iop.org/article/10.3847/2515-5172/abd480 Keys of a Mission to Uranus or Neptune, the Closest Ice Giants https://arxiv.org/abs/2012.09863 The GAPS Programme at TNG. XXX. No detection of reflected light from 51~Peg~b using optical high-resolution spectroscopy https://arxiv.org/abs/2012.10435