Stonyhurst disks
Appearance
A Stonyhurst disk is used to determine the longitude and latitude of sunspots. The Stonyhurst disk was discovered at the observatories in Stonyhurst or Stonyhurst College.
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A Stonyhurst disk is used to determine the longitude and latitude of sunspots. The Stonyhurst disk was discovered at the observatories in Stonyhurst or Stonyhurst College.