This month will see two Caltech-led NASA missions lift off into space, one right after the other. NASA's Lunar Trailblazer is slated to launch from NASA's Kennedy Space Center in Florida no earlier than February 26, while NASA's SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer) mission is slated to launch from Vandenberg Space Force Base in Central California no earlier than February 28. Lunar Trailblazer will map water on the Moon , providing