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Scientists Can Now Spot Hidden Sunspots on the Solar Far Side

Unlike the Moon, the Sun is constantly rotating from our perspective - but we still only see half of it at any given time. Since it takes 27 days to complete a full rotation, that leaves plenty of time for changes to happen to the side we can’t see that could directly impact Earth’s own space weather a few weeks later. Now a team of physicists led by Bibhuti Kumar Jha of the Southwest Research Institute has published a paper in The Astrophysical Journal Supplement Series that uses probability to map out what might be happening on the far side of the Sun, even if we can’t see it directly.

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