| Domain | Definition | ||
| Aerospace | The top of the homosphere, or the level of transition between it and the heterosphere. See atmospheric shell. The homopause probably lies between 80 and 90 kilometers, where molecular oxygen begins to dissociate into atomic oxygen. The homopause is somewhat lower in the daytime than at night. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
