Space & the Universe
How many metric tonnes of meteoritic material (space dust and rock) fall into Earth's atmosphere on an average day, per NASA's estimate?
Answer
44 tonnes
Earth gains roughly the weight of a loaded semi-truck in space dust every single day. Some of it ends up on your roof — a few of the tiny sparkling grains in ordinary gutter sediment are genuine micrometeorites.
Source: NASA Science (48.5 US tons = 44 tonnes per day)
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