Note: Single-source report; awaiting corroboration.
NASA supported the launch of the Solar Neutrino Astro-Particle PhYsics CubeSat, known as SNAPPY, which was deployed into low Earth polar orbit aboard a SpaceX Falcon 9 rocket. The CubeSat carries a prototype solar neutrino detector designed to assess how such detectors perform in orbit, as a step toward future missions placing detectors closer to the Sun.
The prototype detector weighs about half a pound and houses four crystals encased within a shielding block of epoxy loaded with tungsten dust, matching the density of steel. The detector, along with dedicated power and readout electronics, is contained within a CubeSat platform developed by Kongsberg NanoAvionics.
The SNAPPY concept emerged from interest generated by NASA’s Parker Solar Probe, which passes through the Sun’s corona where the solar neutrino flux is nearly 1,000 times stronger than at Earth. Nick Solomey, a professor at Wichita State University, emphasized the importance of understanding the Sun’s energy source, which sustains life on Earth.
Neutrinos are the second most abundant fundamental particles in the universe and may help scientists learn more about the Sun’s core, the origin of mass, and the universe's structure. On Earth, neutrino detectors are often buried underground to isolate their weak signals. SNAPPY aims to collect data to support the feasibility of larger detectors in space, positioned closer to the Sun.
One of SNAPPY’s goals is to demonstrate that a neutrino detector can function reliably in space and to distinguish true neutrino interactions from similar energy signals. The results will inform whether future missions with large-scale detectors near the Sun are possible.