Franklin advanced a scientific – not supernatural – understanding of astronomical events such as eclipses. His satirical character 'Poor Richard' mocked those who bought into astrological predictions.
We take our understanding of the solar system for granted, but it took centuries to figure out. The original writings of Ptolemy, Copernicus, Galileo and others show how they sparked a revolution.
In the long lead-up to our ultimate flyby of Pluto, space science has reconfigured our notions of what it means to be a solar system, a planet, a world.