How many spaceships would it take to block the Sun from the daylight side of the Earth?
Think of a giant hemispherical shell, constructed of spaceships, sitting just far enough from Earth to be too far for Earth-based defences and close enough to effectively cast a shadow on the entire daylight side of the Earth.
Assume the ships are constructable with current physics; they can be mostly a simply blocking material (wing, or sail) with a small habitable/engine zone (think giant self-propelled tarps). They don't have to be strong, just sufficiently space-worthy to stay intact outside the range of Earth's defences (more or less at current capability) and stay between the Sun and the Earth.
Since these three variables are dependant, please include:
- How big (area) would/could the ships be?
- How many would you need to construct the shield?
- How far from Earth would they be?
This post was sourced from https://worldbuilding.stackexchange.com/q/37866. It is licensed under CC BY-SA 3.0.
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