Space Elevators: How a sci-fi dream could be built today
Surveying the current practical and theoretical factors for and against space elevators (including partial elevators—skyhooks!).
Link tags: megastructures
2
A Black Cloud of Computation
SETI—the Search for Extra Terrestrial Information processing:
What we get is a computational device surrounding the Asymptotic Giant Branch star that is roughly the size of our Solar System.