| Question: |
Do we get lots of dust from space? |
| Category: |
Science > Astronomy & Space |
| Keywords: |
dust, Space, Earth, meteoritic |
| Type: |
what |
Rating: (0 ratings) Views: 56 Discussions: 0 In Watch Lists: 1 |
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 Answer:
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The first attempt to measure the amount of meteoritic dust falling onto Earth was made by Hans Pettersson in the 1950s. His measurement came up with a maximum infall rate across the entire Earth (what scientists call an upper limit) of about 15 million tons per year. His sample was contaminated by volcanic dust, etc., and the real number (measured out in space) is only about 20,000 - 40,000 tons per year.
Source: NASA
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Do we get lots of dust from space?       
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