NASA-Backed SNAPPY CubeSat Launches to Test Solar Neutrino Detector
Summary: A NASA-supported CubeSat called SNAPPY (Solar Neutrino Astro-Particle PhYsics) launched aboard a SpaceX Falcon 9 from Vandenberg Space Force Base on May 3, carrying a prototype detector designed to study solar neutrinos — particles produced in the Sun's core that travel at near-light speeds.
The SNAPPY CubeSat launched at 12:00 a.m. PDT on Sunday (May 3) aboard a SpaceX Falcon 9 rocket from Space Launch Complex 4 East at Vandenberg Space Force Base in California, with deployment handled by Exolaunch.
The SNAPPY project will test a prototype solar neutrino detector in a low Earth polar orbit. Weighing approximately half a pound (227 grams), the prototype detector consists of four crystals encased in a shielding block made of epoxy loaded with tungsten dust to match the density of steel. The detector and its dedicated electronics stack for power and readout are housed inside a CubeSat platform from Kongsberg NanoAvionics.
The concept was inspired by NASA's Parker Solar Probe mission. As the probe prepared to become the first spacecraft to fly through the Sun's corona, Nick Solomey, a professor of mathematics, statistics, and physics at Wichita State University, recognized that the spacecraft would pass through an area where the solar neutrino flux — the rate of particles passing through a specific area — is nearly 1,000 times stronger than what reaches Earth.
"All life on Earth — past, present, and future — relies on the Sun," Solomey said. "We must work to understand this ball of energy."
The SNAPPY detector works by registering interactions between solar neutrinos and the crystal lattice. When solar neutrinos pass through the crystals, they produce detectable signals that allow researchers to pinpoint where nuclear fusion reactions occur inside the Sun. The detector can also measure the number of neutrinos arriving from different directions within the solar core, providing a more complete picture of stellar structure.
SNAPPY was supported by NASA through its CubeSat Launch Initiative, which provides opportunities for small satellites to conduct scientific investigations, technology demonstrations, and STEM education projects.