January 22, 2021 updates Posted on January 22, 2021 by Doug Loss Autonomous Navigation of Relativistic Spacecraft in Interstellar Space https://arc.aiaa.org/doi/10.2514/1.G005340 Tidal Dissipation in Dual-body, Highly Eccentric, and Nonsynchronously Rotating Systems: Applications to Pluto–Charon and the Exoplanet TRAPPIST-1e https://iopscience.iop.org/article/10.3847/PSJ/abc0f3 H2SO4 and Organosulfur Compounds in Laboratory Analogue Aerosols of Warm High-metallicity Exoplanet Atmospheres https://iopscience.iop.org/article/10.3847/PSJ/abc558 A search for a 5th planet around HR 8799 using the star-hopping RDI technique at VLT/SPHERE https://arxiv.org/abs/2101.08268 Sulfur Chemistry in the Atmospheres of Warm and Hot Jupiters https://arxiv.org/abs/2101.08327 The NASA High-Resolution Speckle Interferometric Imaging Program: Validation and Characterization of Exoplanets and Their Stellar Hosts https://arxiv.org/abs/2101.08378 A High-Contrast Search for Variability in HR 8799bc with VLT-SPHERE https://arxiv.org/abs/2101.08514 Speckle Observations of TESS Exoplanet Host Stars: Understanding the Binary Exoplanet Host Star Orbital Period Distribution https://arxiv.org/abs/2101.08671