Janice Boekhoff
 

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Did you know that space dust rains down on us constantly? And a lot of it, too. Scientists estimate as much as 40,000 tons per year. Space dust is thought to originate mainly from collisions between comets and asteroids and is composed of fine particles made of mostly silicate minerals with some sulfides, metals and carbonaceous material.

No wonder my central vacuum gets such a workout every week. And to think, I blamed the hairy dog and my crumb-dropping kids.

 

Reference: http://www.universetoday.com/443/constant-rain-of-space-dust-adds-up/, http://www.britannica.com/EBchecked/topic/139217/interplanetary-dust-particle-IDP

Photo Credit: ID 25681056 © Nienora | Dreamstime.com

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