U.S.'s Most Advanced Planetarium
Saint Louis Planetarium to Unveil U.S.'s Largest, Most Advanced Hybrid System
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The Saint Louis Science Center's James S. McDonnell Planetarium will reopen on July 18, 2026, with the largest and most advanced hybrid planetarium in the United States, according to PR Newswire. The upgrade marks the biggest leap forward for the facility in more than 25 years.
The centerpiece of the overhaul is the GOTO Chiron III Hybrid Star Projector — the first of its kind ever installed in the U.S. WFMZ reports the upgrades were made possible by a generous gift from the St. Louis-based Centene Foundation.
A First-of-Its-Kind Star Projector Comes to St. Louis
The GOTO Chiron III Hybrid Star Projector is the crown jewel of the renovation. It is the first unit of its kind installed anywhere in the United States. The projector can display all 9,500 stars visible to the naked eye in accurate color. It can also show more than 100 million stars and hundreds of deep-sky objects, according to PR Newswire.
Alongside the star projector, the planetarium is adding a Cosm Digistar Full-Dome Data Visualization System. Together, these two systems create a hybrid setup that puts the St. Louis planetarium in rare company among U.S. science institutions, Street Insider reported.
22,000-Watt Sound System Powers Full 360-Degree Experience
The technology upgrades go beyond visuals. The Orthwein StarBay will feature a brand-new 22,000-watt surround-sound system. The audio is designed to wrap around the entire dome, creating a full 360-degree immersive experience for visitors, according to ADVFN.
The combination of cutting-edge projection and high-powered audio puts the planetarium in a new class. Visitors will feel surrounded by space — both above and around them — in a way the facility has never offered before.
Centene Foundation Gift Drives the Milestone Renovation
The entire technology overhaul was funded through a major gift from the Centene Foundation, a St. Louis-based charitable organization. Without that support, the upgrades — the largest in over a quarter century — would not have been possible, WFMZ reported.
The Centene Foundation's contribution reflects a growing trend of private philanthropy driving public science education. The gift positions the James S. McDonnell Planetarium as a national leader in astronomy programming and immersive science experiences.
Planetarium to Connect With 700 Institutions Worldwide
The upgraded facility will do more than dazzle local visitors. The planetarium plans to connect with over 700 other planetariums and museums around the globe. Those connections will allow it to host live lectures and presentations from institutions worldwide, according to PR Newswire.
The grand reopening is set for July 18, 2026. When the doors open, St. Louis will be home to a facility that rivals any planetarium in the country — powered by a star projector that no other U.S. venue has ever used before.
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