September 16, 2021 updates Posted on September 16, 2021 by Doug Loss SETI as a Central Project: An Addendum to Space Development Futures https://www.centauri-dreams.org/2021/09/10/seti-as-a-central-project-an-addendum-to-space-development-futures/ Exosphere Modeling of Proxima b: A Case Study of Photochemical Escape with a Venus-like Atmosphere https://arxiv.org/abs/2109.06963 Three faint-source microlensing planets detected via resonant-caustic channel https://arxiv.org/abs/2109.07068 Multi-scale photonic emissivity engineering for relativistic lightsail thermal regulation https://arxiv.org/abs/2106.03558