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| No visible sunspots here. |
Sunday, February 18, 2018
Sunspot Observation at NearSys Station, 18 February 2018
The sunspot group that was visible last week is gone. Since it appeared at the sun's meridian (from Earth's perspective) eight days ago and the group has rotated at least 90 degrees, the sun must rotation once on its axis in less than 4X8 or 32 days.
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