The latitude and longitude coordinates for these can be calculated using Stonyhurst Disks, circular pieces of cardboard drawn to appropriate diameter.
The latitude and longitude coordinates for these can be calculated using Stonyhurst Disks, circular pieces of cardboard drawn to appropriate diameter. Their apparent asymmetry is described by the Wilson Effect and their continuing formation is described by Sporer's Law. Their Modified Zurich Classes are incorporated into the McIntosh classification system for them, and a daily count of them and their groups is given by the ►Wolf Number. Sometimes formed from smaller pores, which lack a penumbra, the Maunder Minimum notably saw a reduction in them. FTP, name these dark regions on the photosphere surface of the Sun.
The latitude and longitude coordinates for these can be calculated using Stonyhurst Disks, circular pieces of cardboard drawn to appropriate diameter.
sunspots (please notice my effort at sneaking the Maunder Minimum into the tossup)     