* The Hubble Space Telescope orbits Earth in low Earth orbit (LEO), which is roughly 160-2000 kilometers above the Earth's surface.

* The exosphere is the outermost layer of Earth's atmosphere, extending far beyond LEO. It's where the atmosphere gradually fades into space.

So, while the Hubble Telescope is technically "within" the exosphere, it's far beyond the other layers of the atmosphere:

* Troposphere: Where weather occurs.

* Stratosphere: Contains the ozone layer.

* Mesosphere: Burns up most meteoroids.

* Thermosphere: Where the International Space Station orbits.

The Hubble Telescope's orbit is well above any of these traditional layers, placing it firmly in the realm of space.