April 8, 2021 updates Posted on April 8, 2021 by Doug Loss Irradiance Variations of the Sun and Sun-Like Stars – Overview of Topical Collection https://link.springer.com/article/10.1007/s11207-021-01802-8 Five carbon- and nitrogen-bearing species in a hot giant planet’s atmosphere https://www.nature.com/articles/s41586-021-03381-x Transit Analysis of HATS-4 b by Citizen Scientists https://iopscience.iop.org/article/10.3847/2515-5172/abf496 Quantifying the Classification of Exoplanets: in Search for the Right Habitability Metric https://arxiv.org/abs/2104.02991 RAFTER: Ring Astrometric Field Telescope for Exo-planets and Relativity https://arxiv.org/abs/2104.03003 A transit timing variation observed for the long-period extremely low density exoplanet HIP 41378 https://arxiv.org/abs/2104.03159