Astronomers have compiled the largest catalog of stellar rotation periods to date, detailing the spin rates for 1,046,317 stars. Andrew W. Boyle and collaborators at The University of North Carolina at Chapel Hill leveraged data from NASA's Transiting Exoplanet Survey Satellite (TESS) to achieve this feat. Their work significantly expands the number of stars with known rotation periods, offering a wealth of new data for celestial research.

This extensive dataset, dubbed the TESS All-Sky Rotation Survey (TARS), covers stars within approximately 1,600 light-years of Earth. The researchers developed a classification algorithm to distinguish true stellar variability from instrumental noise, estimating that about 93% of the cataloged periods accurately reflect stellar rotation. This effort boosts the number of known rotation periods by roughly 2.3 times for nearby stars and 4.0 times for those further out.

TARS provides a crucial resource for studying stellar evolution, exoplanet detection, and the structure of the Milky Way. By mapping fast-rotating, younger stars, the survey clarifies the distribution of young stellar associations in our local galactic neighborhood. The catalog's homogeneous nature makes it an invaluable tool for comparative studies across a broad range of astronomical disciplines.