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Exosphere

The exosphere is the uppermost layer of the atmosphere. On Earth, its lower boundary is estimated at 500 km to 1000 km above the Earth's surface, and its upper boundary at about 10,000 km. It is only from the exosphere that atmospheric gases can, to any appreciable extent, escape into outer space.



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Reformed churches

... established under the Peace of Westphalia, in 1648, but political difficulties at the end of the 17th century almost eliminated them. In the 19th century, by state mandate ...

 
 
 
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