Today in History: November 9. Benjamin Banneker

Banneker spent most of his life on his family’s 100-acre farm outside Baltimore. There, he taught himself astronomy by watching the stars and learned advanced mathematics from borrowed textbooks. In 1752, Banneker garnered public acclaim by building a clock entirely out of wood. The clock, believed to be the first built in America, kept precise time for decades. Twenty years later, Banneker began making astronomical calculations that enabled him to successfully forecast a 1789 solar eclipse. His estimate, made well in advance of the celestial event, contradicted predictions of better-known mathematicians and astronomers.

I’ve gone geocaching in Benjamin Banneker Park, which is how I first learned of him — like many parks named after people, there was a short history on a sign.