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.
A: As the highest layer of the atmosphere, the Earth's exosphere contains very thin air and features both lower and upper boundaries. The exosphere's boundaries vary by altitude depending on the level of the sun's activity and solar radiation emissions. There is some debate among scientists as to whether the exosphere should be considered a layer of the atmosphere or a part of space.