Astronomers use 400-year-old sketches to solve Sun's longstanding mystery

Astronomers use 400-year-old sketches to solve Sun's longstanding mystery

German astronomer Johannes Kepler made sketches of sunspots in 1607 from his observations of the sun's surface - and centuries later, the pioneering drawings are helping scientists solve a solar mystery.Even though everything in the solar system revolves around the sun, scientists have yet to unlock many of the star's secrets.However, studying the variability of the sun over time, including the solar cycle, could answer some of the most longstan…