Christopher Scheiner’s Rosa Ursina sive Sol, 1626, charting sunspots.
Christopher Scheiner’s Rosa Ursina sive Sol, 1626, charting sunspots. -- source link
Tumblr Blog : blog.christophercannon.net
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Christopher Scheiner’s Rosa Ursina sive Sol, 1626, charting sunspots. -- source link
Tumblr Blog : blog.christophercannon.net