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How to Observe and Measure Naked-eye Sunspots
As Solar Cycle 25 ticks up, naked-eye sunspots are becoming more frequent. They're not only fun to observe, but with this simple method you can determine just how big they are. We also have news on a bright supernova!
The post How to Observe and Measure Naked-eye Sunspots appeared first on Sky & Telescope.
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