As any historian of medieval East Asia or player of Civilization V: Brave New World will tell you, 15th century Koreans were really, really, really good at science.
Image by tyrogthegatekeeper/Wikimedia Commons.
When those 15th century Korean astronomers looked at the sky, they knew they were witnessing something important about their universe.
With the right tools, some tenacity, and a bit of luck, human beings have made it possible to find out what that is. Even after a 600-year search.
Science, then, as now, totally rules.