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Sunspots AR2681, 2682 & 2683 in Calcium-K, 30/09/17 | by DrRobin-Astro
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Sunspots AR2681, 2682 & 2683 in Calcium-K, 30/09/17

Sunspots AR2681, 2682 & 2683 in Calcium-K, 30/09/17

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Taken on September 30, 2017