'These dark areas appear so because they are 4,000 degrees cooler than the rest of the Sun's visible surface'
sunspots
THE SUN BELT: These dark areas appear so because they are 4,000 degrees cooler than the rest of the Suns visible surface
These dark areas appear so because they are 4,000 degrees cooler than the rest of the Sun's visible surface
These dark areas appear so because they are 4,000 degrees cooler than the rest of the Sun's visible surface
THE SUN BELT
sunspots
THE SUN BELT