Chrysalis: A 58-Kilometer, Multi-Generational Starship for a Centuries-Long Voyage

Chrysalis is a concept for a 58-kilometer rotating habitat designed to carry around a thousand to two thousand humans on a 400-year interstellar voyage, using a direct fusion drive and fully closed life support, with generation-spanning governance, education, and knowledge preservation. The project provides a detailed, integration-focused study of how such a ship could be assembled, powered, shielded, and kept socially stable, while honestly outlining remaining unknowns and the enormous technical and ethical challenges involved.