While the exosphere is the outermost layer of Earth's atmosphere, it's important to note that:

* Satellites don't orbit within the exosphere itself. They orbit *above* the exosphere, in the region called space.

* There's no distinct boundary between the exosphere and space. The exosphere gradually fades into the vacuum of space.

* Satellites orbit at different altitudes. Some orbit low Earth orbit (LEO) at 160 to 2,000 kilometers, while others orbit at higher altitudes, such as geostationary orbit at 35,786 kilometers.

So, while the exosphere is technically the outermost layer, satellites are considered to be orbiting in space beyond the exosphere.