A Quarkus + Chart.js tutorial using NASA's exoplanet catalogue. Java builds discovery counts, method shares, and a period/radius scatter plot with XDEV's chartjs-java-model. Planets with missing measurements stay in the counts; only usable pairs enter the scatter. Includes a reproducible snapshot, an explicit live source, and 13 tests. https://www.the-main-thread.com/p/quarkus-chartjs-java-exoplanet-dashboard #Java #Quarkus #DataVisualization