> The "few trillion dollars" part is a problem. I am not particularly convinced that this requires a few trillion dollars. Is there some hard evidence that sun

> The "few trillion dollars" part is a problem. I am not particularly convinced that this requires a few trillion dollars. Is there some hard evidence that sunshades are impossible to deploy with less than $10 billion? http://diyhpl.us/~bryan/papers2/space/Self-deployed%20extremely%20large%20low%20mass%20space%20structures%20-%202007.pdf http://diyhpl.us/~bryan/papers2/space/Self-deployed%20extrem...