A new telescope technology -- measuring just six millimeters in diameter -- could improve how future space missions study and monitor the Sun while simplifying onboard hardware and reducing costs. The technology is built from a metasurface, which is a device engineered with nanoscale structures that manipulate light in unusual ways. In tests at the Dunn Solar Telescope in New Mexico, the metasurface captured scientifically meaningful data of the Sun's magnetic fields and sunspots.