Most people think that the Earth’s atmosphere stops a bit over 62 miles (100 km) from the surface, but a new study based on observations made over two decades ago by the joint US-European Solar and Heliospheric Observatory (SOHO) satellite shows that it actually extends as far 391,000 miles (630,000 km) or 50 times the Earth’s diameter. This makes the Moon a very high altitude aircraft.
Source: Earth’s atmosphere extends much farther than previously thought
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