The proposed solution isn't perfect but could help buy us some time, researchers say.
, or L1 — a gravitationally stable spot between the sun and Earth, about 1 million miles from our planet — the team used computer simulations to study how long these particles would hover.
For example, in their modeling work, researchers launched a test particle from the moon's northern pole to an orbit close to L1. They found that the particle, launched at 1.7 miles per second , spent a total of five days in front of the sun before being dispersed. The team concluded that launching moon dust at about 1.9 to 3 miles per second toward L1 would be the most promising strategy, shading Earth for the equivalent of up to a week every year.
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