Exosphere

The exosphere is the outermost layer of a planet's atmosphere. Orbital skydiving is done from exospheric altitudes. 

On stardate 43779.3, the USS Enterprise (NCC-1701-D) was preparing exospheric charts of the Hayashi system, an essential step towards colonization, before it was intercepted by the USS Hood (Excelsior class). 

External link


Esosfera