Asset Publisher

MDI observations of supergranulation

MDI observations of supergranulation


Copyright: SOHO/MDI (ESA/NASA)

The thousands of networks of cells called supergranules that cover the Sun's surface are most easily visible in 'dopplergrams'. A dopplergram, such as this one from the SOHO spacecraft, shows motions on the Sun's surface with areas moving toward us appearing dark, and areas moving away, bright.

This image is the result of averaging 30 velocity images and subtracting the Sun's rotation,  and can also be thought of as a map of the speed of the Sun's surface. Supergranules are large cells, measuring around 30 000 kilometres across (about two Earths across) but their origin and depth are currently unknown.

Last Update: 1 September 2019
21-Apr-2021 11:01 UT

ShortUrl Portlet

Shortcut URL

https://sci.esa.int/s/A1exq3A

Also Available As

Related Images

Related Videos

Related Publications

Related Links

Documentation