☀️⌛ Stealth Craft in Space
Kardashev range: 1.0–2.5
Spacecraft are usually assumed to be easy to see, but geometry matters. Carefully chosen optical paths may reduce simple sunlight and thermal signatures more than casual intuition suggests.
Notes
Two candidate geometries here are the inverted-hourglass pass-through idea and very long tube arrangements that complicate direct observation and passive heating assumptions.