As 2025 concludes, astronomers have made significant discoveries, including the identification of 'Quipu,' the largest known structure in the universe. This supermassive formation, detected using the ROSAT X-ray satellite, spans 428 megaparsecs and contains approximately 200 quadrillion solar masses. Named after the Inca counting system, Quipu was discovered by researchers from the Max Planck Institute. The year also saw advancements in exoplanet hunting and observations of cosmic formations and comets.