Hubble Telescope’s Ambitious Survey Provides Unprecedented Insights into the Lives of Stars In an impressive feat, a team of scientists and engineers have completed one of the largest and most ambitious Hubble Space Telescope programs ever undertaken. The three-year survey, called ULLYSES (Ultraviolet Legacy Library of Young Stars as Essential Standards), has collected data on nearly 500 stars, offering new insights into their formation, evolution, and impact on their surroundings. The ULLYSES program, completed in December 2023, provides a rich spectroscopic dataset obtained in ultraviolet light that astronomers will be studying for decades to come. Because ultraviolet light can only be observed from space, Hubble is the only active telescope capable of conducting this research. Julia Roman-Duval, Implementation Claude can make mistakes. Please double-check responses.