Johannes Kepler thought he was sketching Mercury orbiting the sun. What he actually captured solved a solar mystery
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific developments and more. In 1607, German astronomer Johannes Kepler sketched sunspots based on his observations of the sun’s surface. Centuries later, the groundbreaking drawings are helping scientists solve a solar mystery. Although everything in the solar system revolves … Read more