In case one of you persons doesn't understand the complexity of xenophobia, here is a nice, and clear explanation: The complexity of xenophobia, is simple the felt opinion toward foreigners, or unknown persons.
The exosphere is the uppermost region of Earth's atmosphere as it gradually fades into the vacuum of space. Air in the exosphere is extremely thin - in many ways it is almost the same as the airless void of outer space.
This layer contains: 1  Ionosphere - This is the lower part of the thermosphere. It extends from about 80 to 550 km. 2  Exosphere - the upper part of the thermosphere. It extends from about 550 km for thousands of kilometers.