Megastructure
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A megastructure is a very large artificial object, although the limits of precisely how large vary considerably. Some apply the term to any especially large or tall building. Some sources define a meg
The Great Wall of China, at 6,352 km or 3,947 mi long, is an ancient era megaproject. This picture was taken near Beijing in February 2005.
One concept for the space elevator has it tethered to a mobile seagoing platform.
Dyson sphere
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A Dyson sphere is a hypothetical megastructure that encompasses a star and captures a large percentage of its power output. The concept is a thought experiment that attempts to imagine how a spacefari
Megastructure
…could live on either side, held by the gravity of the disk and still receive sunlight from a star bobbing up and down in the middle of the disk. A Dyson sphere (also known as a Dyson shell) is a structure or mass of orbiting objects that completely surrounds a star to make full use of its solar energy. A…
A depiction of a hypothetical Dyson swarm surrounding a star
Freeman Dyson, who explored the concept from a scientific perspective