The sturgeon living in the Great Lakes don’t have a lot to do with the moon—or at least they didn’t until the Algonquin Native American tribe came along. The Algonquins discovered that sturgeon were most plentiful in the lakes in August, and so they paid a small tribute to that fact. When a full moon appeared in the sky in that month, they dubbed it a sturgeon moon. But it wasn’t just any full moon that would earn the honorific. It had to be a so-called supermoon—one of which will occur today, Aug. 1.