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How much dust falls on Earth each year? Does it affect our planet’s gravity?

Ben Howes, Mayfield Heights, Ohio
RELATED TOPICS: ZODIACAL LIGHT
Zodiacal light
We think the dust in our solar system (often called “cosmic dust”) originates largely from collisions between asteroidal bodies in addition to active comets as they spew material during their passages through the inner solar system. Scientists estimate that roughly 100 metric tons of this cosmic dust enters Earth’s atmosphere every single day. This estimate comes from data from spacecraft that have measured the amounts of dust in the inner solar system and also from micrometeorites and interplanetary dust collected on Earth’s surface.

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