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Interstellar dust - ice ages?
I am a retired meteorologist - just an interest in astronomy. The last
ice age ended about 20k years ago. Nobody really knows why ice ages happen but I have often wondered about interstellar dust. Seems reasonable to me that as the solar system rotates around the galaxy it may encounter dust clouds which would reduce solar radiation reaching the Earth and thus trigger ice ages. There are some suggestions that the sun is a variable star. How would it be shown if this could just be due to interstellar dust? Would this dust actually be between the Earth and the Sun or would the solar 'wind' keep it away? |
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