Unit 1Flexbook: Course Introduction2 topics+Unit 2Flexbook Unit 1: The Galactic Baseline1 topic+Unit 3Flexbook Unit 2: Architectures of Chaos1 topic+Unit 4Flexbook Unit 3: The Goldilocks Paradox1 topic+Unit 5Flexbook Unit 4: The Genesis Engine1 topic+Unit 6Flexbook Unit 5: The Silicon & Signal Frontier1 topic+Unit 7Flexbook Unit 6: The Longevity Equation2 topics+Unit 11Unit 1: Habitability4 topics+Unit 12Unit 2: Water and Life3 topics+Unit 13Unit 3: Space Travel3 topics+Unit 14Unit 4: Mission Logistics3 topics+Unit 20Unit 2: Drake Equation1 topic+