Mr. Nicolaus Copernicus (b.1473) found out that the planets go around the sun. It was a big discovery, though unpopular at the time.

What’s surprising is that he made his observations with the naked eye, no telescope at all. The skies over Poland must be very clear.

Rhino vision is not outstanding, so We are doubly-wowed. Visionary guy, Mr. Copernicus.