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Labels: adenovirus | autoradiograph | earth | plant | poster
OCR: Modified Penumbra of Sunspot Zurich class largest spot distribution No penumbra None Single No penumbra Open One penumbra Small symmetric Intermediate Multiple penumbrae Small asymmetric Compact arae spots with Large symmetric complex penumbrae Example Large osymmetric Penumbro Largest aroups with compiex penumbrae "Dai Class Penumbra Single targe Distribution spot with penumbra Umbrae Sinale Rudimentary Smail Smatl qroups