July 30, 2021 updates Posted on July 30, 2021 by Doug Loss Continued development of the pulsed magnetic nozzle for the Pulsed Fission Fusion (PuFF) vehicle https://arc.aiaa.org/doi/10.2514/6.2021-3608 Experimental Validation Testing of a Paired-Particle Matter/Anti-Matter Propulsion System, with Proposed Project Management https://arc.aiaa.org/doi/10.2514/6.2021-3251 Numerical Optimization of Warp Drive Geometries https://arc.aiaa.org/doi/10.2514/6.2021-3596 Planetary migration in precessing disks for S-type wide binaries https://academic.oup.com/mnras/advance-article-abstract/doi/10.1093/mnras/stab2059/6330471 A HARPS-N mass for the elusive Kepler-37d: a case study in disentangling stellar activity and planetary signals https://arxiv.org/abs/2107.13900 Speckle Observations of TESS Exoplanet Host Stars. II. Stellar Companions at 1–1000 au and Implications for Small Planet Detection https://iopscience.iop.org/article/10.3847/1538-3881/ac0d06 Transmission Spectroscopy of the Earth–Sun System to Inform the Search for Extrasolar Life https://arxiv.org/abs/2107.13652 Interstellar Communications https://ieeexplore.ieee.org/document/9438311 HD 183579b: A Warm Sub-Neptune Transiting a Solar Twin Detected by TESS https://arxiv.org/abs/2107.14015 A large sub-Neptune transiting the thick-disk M4V TOI-2406 https://arxiv.org/abs/2107.14125 Beyond runaway: initiation of the post-runaway greenhouse state on rocky exoplanets https://arxiv.org/abs/2107.14150 ESA F-Class Comet Interceptor: Trajectory Design to Intercept a Yet-to-be-discovered Comet https://arxiv.org/abs/2107.12999 TOI-532b: The Habitable-zone Planet Finder confirms a Large Super Neptune in the Neptune Desert orbiting a metal-rich M dwarf host https://arxiv.org/abs/2107.13670 Detectable Abundance of Cyanoacetylene (HC3N) Predicted on Reduced Nitrogen-Rich Super-Earth Atmospheres https://arxiv.org/abs/2107.13097