The photosphere does not rotate in one piece, lower latitudes outrunning higher.
The temperature of the photosphere at this stage has reached a maximum, and the star is new of the helium type.
On account of the relatively great strength of Ha at a considerable distance from the photosphere, the new photographs recorded flocculi at high levels previously unexplored.
The conclusion is that the photosphere is very sharply defined and shows no definite departure from a truly spherical shape.
Bridges, more brilliant than the rest of the photosphere, form across them, and they may divide into two parts which separate from one another with great velocity.