Sunspots
Dark spots, some as large as 50, 000 miles in diameter, move across the surface of the sun, contracting and expanding as they go. These strange and powerful phenomena are known as sunspots. This resource will allow you to explore the nature of sunspots and the fascinating history of our efforts to understand them. Included here are interviews with solar physicists and archeoastronomers, historic ...
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Astrophotography@