Images showing atmospheric optical phenomena, which can also be observed on other stellar objects (such as storm clouds on Mars, Jupiter, Solar corona etc.) should be placed within Category:Atmospheric optical phenomena or a subcategory. Otherwise Category:Atmospheric optical phenomena of Earth would be the correct cat.
- The parameter 'category' will take one or a stream of categories and assert them on the page INSTEAD OF the default category Category:Atmospheric optical phenomena of Earth.
- Otherwise the template expresses that auto-category
- define category=" " would also replace it, so it can be inhibited if desired.