Centennial festivities for the planetarium kick off under the auspices of the IAU's '100 Hours of Astronomy' event
The International Astronomical Union (IAU) and the National Astronomical Observatory of Japan (NAOJ) are joining forces with the International Planetarium Society (IPS) to host the "100 Hours of Astronomy" event from October 2-5, 2025.
This annual event, organised by the IAU Office for Astronomy Outreach (OAO), aims to foster global unity under one sky, encouraging scientific curiosity and celebration of astronomy.
The event will kick off with a 360° livestream of the planetarium show "Big Astronomy" on October 2nd, followed by a talk on the Vera C. Rubin Observatory. Ardis Herrold from the Rubin Observatory will present a talk entitled "The NSF-DOE Vera C. Rubin Observatory - The Transformative Years" after the "Big Astronomy" show.
Community engagement is a key aspect of this event. Brainstorming event ideas, advertising on the OAO Astronomy Engagement Events Calendar, and social media promotion using designated hashtags are encouraged. Planetariums, regardless of size or type, are invited to participate in the 24-hour continuous event.
On October 4th, a 24-hour continuous stream from the Akashi Municipal Planetarium in Japan will showcase various planetariums worldwide.
The IAU, founded in 1919, is the international astronomical organization that brings together about 13,000 astronomers from around the world. The IAU serves as the internationally recognized authority for assigning designations to celestial bodies and their surface features.
The IPS, a global association of planetarium professionals with nearly 500 members from 50 countries, values science as a way of knowing, inclusivity of and respect for cultures, openness to new ideas, service excellence, and leadership in the field. The IPS mission is to provide the planetarium community with professional development, science literacy, and humanities awareness. Its vision is to be a creative and supportive resource for innovation, advancement, and cooperation among planetariums.
Additional details and registration forms will be available on the IAU OAO and IPS websites in the coming months. Stay tuned for more updates on this exciting global event!
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