'These dark areas on the 6100-degree-Celsius photosphere have a temperature of about 4100 degrees'
Sunspots
THE SUN: These dark areas on the 6100-degree-Celsius photosphere have a temperature of about 4100 degrees
These dark areas on the 6100-degree-Celsius photosphere have a temperature of about 4100 degrees
These dark areas on the 6100-degree-Celsius photosphere have a temperature of about 4100 degrees
THE SUN
Sunspots
THE SUN