Global space agencies, research groups and citizen scientists are marking the 10th anniversary of World Asteroid Day on 30 June, a United Nations-endorsed initiative created to raise public awareness of asteroid science and planetary-defense efforts. The commemoration coincides with the 1908 Tunguska event in Siberia, the largest recorded asteroid impact in modern history. Festivities include a free, real-time webcast by the Virtual Telescope Project that begins at 5 p.m. EDT, offering live views of several near-Earth asteroids while astronomers discuss detection techniques and impact-mitigation strategies. NASA and partner institutions are also promoting citizen-science projects that let volunteers classify telescope images and track small bodies from home. NASA’s Center for Near-Earth Object Studies reports that more than 30,000 near-Earth objects have been cataloged, with no large body currently posing a threat for at least a century. The agency’s 2022 Double Asteroid Redirection Test successfully altered the orbit of Dimorphos, demonstrating kinetic impact as a viable defense method, and the European Space Agency’s Hera probe is scheduled to revisit the system in December 2026 to assess long-term results. New technologies are accelerating discovery. An AI search of 37,000 Hubble Space Telescope images recently revealed 1,031 previously unknown asteroids, while the James Webb Space Telescope has detected objects as small as 100–200 meters in the main belt. On the ground, the Vera Rubin Observatory in Chile identified 2,104 new near-Earth objects during initial scans and is expected to find millions more once fully operational.