Scientists at NASA have revealed that the smoke from the Australian bushfires will circumnavigate the entire globe.

They used images from their Ozone Mapping and Profiler Suite (OMPS) Nadir Mapper to make the remarkable discovery – showing just how colossal and destructive these fires are.

The revelation comes as Australian regional and metropolitan areas both choke on hazardous smoke – at one point this week Melbourne had the worst air quality of anywhere on earth and Wangaratta had the third worst.

“The smoke is expected to make at least one full circuit around the globe, returning once again to the skies over Australia,” NASA said.

“Over the past week, NASA satellites have observed an extraordinary amount of smoke injected into the atmosphere from the Australian fires and its subsequent eastward dispersal.”