September 5, 2019 updates Posted on September 5, 2019June 28, 2020 by Doug Loss Settler of the Galaxy: The CSU Solution to GTOC-X https://www.researchgate.net/publication/335390088_SETTLER_OF_THE_GALAXY_THE_CSU_SOLUTION_TO_GTOCX Stellar Engines: Design Considerations for Maximizing Acceleration https://www.sciencedirect.com/science/article/pii/S0094576519312457 Galactic Habitability Re-Examined: Indications of Bimodality https://arxiv.org/abs/1909.01742