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Thanks, that's a terrific idea! I don't know what is a "L1 sunshade" but I had thought briefly about objects in geostationary orbit. Please make it a serious

• PaulHoule 3y ago
  The sunshade sits at the L-1 point between the Sun and Earth, it is basically a solar sail so if you made one at an asteroid it could fly to the Earth on it’s own power. People have talked about launching solar sails up from the Earth but the asteroid material scenario has no off-target environment effects in the Earth because it never touches the Earth.