Using measurements taken by the New Horizons spacecraft as it flew by Pluto in July 2015, students have an opportunity to see how new data can change scientific understanding and practice their math skills in a real-world application. Materials Student Worksheet - download PDF Teacher Guide - download PDF Background On July 14, 2015 at 4:49 a.m. PDT, NASA's New Horizons spacecraft sped past Pluto – a destination that took nearly nine and a half years to reach – and collected scientific data alo