While cirrus clouds are found high in the atmosphere, they are not the highest. Noctilucent clouds are the highest clouds in the atmosphere, forming at an altitude of 76 to 85 kilometers (47 to 53 miles).
Cirrus clouds typically form at altitudes between 5 to 13 kilometers (3 to 8 miles).
Here's a breakdown of cloud heights:
* Noctilucent clouds: 76 to 85 km (47 to 53 miles)
* Cirrus clouds: 5 to 13 km (3 to 8 miles)
* Altostratus and Altocumulus clouds: 2 to 7 km (1 to 4 miles)
* Stratus and Cumulus clouds: Up to 2 km (1 mile)
So, while cirrus clouds are high, they are not the highest clouds in the atmosphere.
