Curtis Struck of Iowa State University suggests that lunar dust particles are just the right size to scatter sunlight. They could be positioned in the Moon's orbit in a pair of stable clouds that would each pass in front of the Sun once a month, blocking sunlight for about 20 hours each month
(Journal of the British Interplanetary Society, vol 60, p 1).
(Journal of the British Interplanetary Society, vol 60, p 1).
See the article Keep Earth cool with Moon dust in the NewScientist
