Supergranules
Supergranules are much larger versions of granules (about 35,000 km across) but are best seen in measurements of the "Doppler shift" where light from material moving toward us is shifted to the blue while light from material moving ...
supergranule: A large granule on the sun's surface including many smaller granules.
superluminal expansion: The apparent expansion of parts of a quasar at speeds greater than the speed of light.
Later works (1960's) by Leighton, Noyes and Simon established a typical size of about 30000 km for supergranules with a lifetime of about 24 hours.
Within the supergranule boundaries, jets of material shoot into the chromosphere to an altitude of 4000 km (about 2500 mi) in 10 minutes.
The chromosphere is also home to spikes of gas called spicules that rise through it at the edges of the large convection cells that exist within the layer (so called supergranules).
Superimposed upon the granules are supergranules (observed by Doppler shift measurements) which have diameters of 30,000 km and lifetimes of 20-25 h.
Instead, they cover only about 1 percent of the total area, tending to accumulate around the edges of supergranules. The Sun's magnetic field is also known to be somewhat stronger than average in those regions.
Each granule has a lifespan of only about eight minutes, resulting in a continually shifting "boiling" pattern. Grouping the typical granules are supergranules up to 30,000 kilometres in diameter with lifespans of up to 24 hours.
New sunspots develop in the intersections of adjacent supergranulation cells. Most of the magnetic flux through the photosphere is concentrated in the supergranule boundaries. [H76]
Supergravity ...
distributed fairly uniformly over the solar disk, that last as long as a day. New sunspots develop in the intersections of adjacent supergranulation cells. Most of the magnetic flux through the photosphere is concentrated in the supergranule ...
 See also: Sun, Light, Solar, Granules, Photosphere
  
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