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Pons_Aelius , 10 months ago (edited 10 months ago) Yep. IIRC: An early (pre-telescope) astronomer did for tens of minutes at a time to document sun spots, but it took weeks for his sight to return and it was likely permanently damaged because of it.
Yep.
IIRC: An early (pre-telescope) astronomer did for tens of minutes at a time to document sun spots, but it took weeks for his sight to return and it was likely permanently damaged because of it.