4 ms·

Which numbers in particular do you have problems with?

• ForHackernews 8y ago
  As a point of reference, the Galileo navigation constellation apparently costs about 10bn (€ not $, but call it even): https://qz.com/1264365/brexit-is-breaking-up-galileo-europes-e10-billion-plan-to-launch-new-satellites/ https://qz.com/1264365/brexit-is-breaking-up-galileo-europes... That system is essentially a modern re-implementation of GPS, a known, proven technology. To suggest that this untested, unproven, highly speculative solar shade project would cost the same is laughable to me. You're also totally discounting the unintended consequences and second-order effects of trying to engineer the climate.
  • d0lph 8y ago
    Your point of reference includes 2 ground control centers, and 30 satellites. To suggest that launching a single satellite would cost the same is to me, laughable. This if anything proves my point, nothing seems insane about launching a lens into space. We have satellites now, this is essentially one with a lens. https://en.wikipedia.org/wiki/Galileo_(satellite_navigation)#System_description https://en.wikipedia.org/wiki/Galileo_(satellite_navigation)... I'm not discounting anything, just assuming scientists and engineers involved have done their job.