<P> The exosphere is the outermost layer of Earth 's atmosphere ( i.e. the upper limit of the atmosphere ) . It extends from the exobase , which is located at the top of the thermosphere at an altitude of about 700 km above sea level , to about 10,000 km ( 6,200 mi ; 33,000,000 ft ) where it merges into the solar wind . </P>
<P> The exosphere is the outermost layer of Earth 's atmosphere ( i.e. the upper limit of the atmosphere ) . It extends from the exobase , which is located at the top of the thermosphere at an altitude of about 700 km above sea level , to about 10,000 km ( 6,200 mi ; 33,000,000 ft ) where it merges into the solar wind . </P>
what is the outermost layer of the atmosphere called
what is the outermost layer of the atmosphere called
exosphere
exosphere