Cosmic dust includes comet dust, asteroidal dust, dust from the Kuiper belt, and interstellar dust passing through our galaxy. It may one day provide physical evidence of life on other planets.
More cosmology resources from Purposeful Universe
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Dr. Stephen Barr — The Multiverse [VIDEO]
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Purposeful Universe
The Purposeful Universe seeks to explore and present, through award winning videos, the abundant order in nature that funnels biological systems toward increasing levels of complexity and sophistication—suggesting that human life is the purposeful outcome of a complex, ordered system.