The Sun: Close-up of active region 9169 | 22-09-2000 | ||
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Active region 9169 was the host of the largest sunspot group observed so far during the current solar cycle. On 20 September 2000, the sunspot area within the group spanned 2,140 millionths of the visible solar surface, an area a dozen times larger than the entire surface of the Earth! | ||
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Credit: SOHO/MDI (ESA & NASA) | |||
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