January 5, 2021 updates Posted on January 5, 2021 by Doug Loss The Biological Study of Lifeless Worlds and Environments https://liebertpub.com/doi/10.1089/ast.2020.2337 Challenges & Strategies for Supporting a Very Long Duration Mission https://arc.aiaa.org/doi/10.2514/6.2021-0483 Interstellar Probe – Goals and Challenges https://arc.aiaa.org/doi/10.2514/6.2021-0485 Needed Evolution in Part Reliability Approaches: from Voyager to Interstellar Probe https://arc.aiaa.org/doi/10.2514/6.2021-0486 An Optimal Navigation Filter for Relativistic Spacecraft https://arc.aiaa.org/doi/10.2514/6.2021-1868 Extraterrestrial: The First Sign of Intelligent Life Beyond Earth https://www.amazon.com/Extraterrestrial-First-Intelligent-Beyond-Earth/dp/0358278147/ Metastable Helium Absorptions with 3D Hydrodynamics and Self-Consistent Photochemistry I: WASP-69b, Dimensionality, XUV Flux Level, Spectral Types, and Flares https://arxiv.org/abs/2101.00042 Metastable Helium Absorptions with 3D Hydrodynamics and Self-Consistent Photochemistry II: WASP-107b, Stellar Wind, Radiation Pressure, and Shear Instability https://arxiv.org/abs/2101.00045 The Hubble WFC3 Emission Spectrum of the Extremely-Hot Jupiter, KELT-9b https://arxiv.org/abs/2101.00469 Polarized radiation and the Emergence of Biological Homochirality on Earth and Beyond https://arxiv.org/abs/2101.00530 CHEOPS observations of the HD\,108236 planetary system: A fifth planet, improved ephemerides, and planetary radii https://arxiv.org/abs/2101.00663