December 28, 2021 updates Posted on December 28, 2021 by Doug Loss About Teaching Students Materials Related to Deep Space Exploration https://www.elibrary.ru/item.asp?id=47231961 Looking for Rings and Tides in Transiting Exoplanets https://repositorio-aberto.up.pt/handle/10216/138548 TOI 560 : Two Transiting Planets Orbiting a K Dwarf Validated with iSHELL, PFS and HIRES RVs https://arxiv.org/abs/2112.13448 Ellipsoidal equilibrium figure and Cassini states of rotating planets and satellites deformed by a tidal potential in the spatial case https://arxiv.org/abs/2112.13767