January
Professor Donald G. York, 1944-2025
January 15, 2026
Donald G. York, an astronomer with the University of Chicago who helped revolutionize the field as a co-founder of the Sloan Digital Sky Survey and made pioneering contributions to the study of the interstellar and intergalactic mediums, died Dec. 26 at the age of 81.
PUEO completes successful flight
January 12, 2026
The Payload for Ultrahigh Energy Observations (PUEO) Launched on December 20th and completed a successful 23 day flight. It is the most sensitive instrument ever built to detect the highest energy neutrinos!