At a time when universities are rethinking how to teach science to students who expect both rigor and interactivity, planetariums have found renewed relevance. Across the field, domes are no longer just about static star fields; they’re increasingly being used for data visualization, live instruction, and public programming that can make abstract astronomy feel immediate. At San Francisco State University, that shift is now arriving at a particularly symbolic moment: the Charles F. Hagar Planetarium has gone dark for a renovation that will preserve its role as a teaching space while updating the technology behind it. SF State says the venue has served more than 100,000 visitors since opening in 1973 and has long supported both university classes and free public shows. (physics.sfsu.edu)
The timing matters because the planetarium sits at the intersection of science education and community access. In a city known for fog, light pollution, and dense urban life, a small dome on campus offers something rare: a controlled, shared view of the night sky. That’s one reason the renovation has drawn attention well beyond the physics department. The university’s plan is not simply to replace old equipment, but to keep the experience interactive while making it more accurate and more versatile for future generations of students, school groups, and casual visitors. (physics.sfsu.edu)
The final show on Oct. 13 carried that sense of transition. As described in Golden Gate Xpress, astronomy graduate student Gillis Lowry led the closing presentation, and the evening was both instructional and emotional. Lowry emphasized the value of science outreach and the importance of connecting people to the natural world, a reminder that planetariums do more than project stars—they create a setting where curiosity can become a shared experience. Jim Muyo, SF State’s director of development communications, said the program taught him about Jupiter’s and Saturn’s moons, illustrating how even seasoned attendees can leave with a fresh sense of discovery. (physics.sfsu.edu)
That educational mission is exactly what the renovation is meant to preserve. SF State has said the current Spitz 512 projector has been in use for more than 50 years, and the upgrade will introduce a new Zeiss star projector designed to produce a more precise rendering of the night sky. According to the university, the new system will display about 9,500 stars and finer Milky Way detail, while the broader renovation may also include a video projection component that can later support data-rich journeys through the solar system and beyond. The point is not to abandon the old model, but to extend it. As the university’s development materials note, the planetarium has long been a training ground for student presenters and science educators, and the modernization is intended to strengthen that pipeline. (physics.sfsu.edu)
The renovation is also a fundraising story, which is familiar territory for public-facing science spaces. SF State has already secured major backing from the Heising-Simons Foundation, bringing its support for the project to $1.95 million, but the university says additional money is still needed for seating, dome lighting, and other elements before the facility can reopen. That phased approach may sound bureaucratic, yet it reflects a common reality in museum and planetarium work: technology can be exciting, but the visitor experience depends just as much on comfort, accessibility, and the ability to host groups well. In other words, a beautiful star field means little if the room itself no longer works as a welcoming learning environment. (develop.sfsu.edu)
“There’s a lot of value in having a dedicated star projector,” Jim Gibson, SF State’s planetarium and observatory technician, told Golden Gate Xpress, underscoring a debate that plays out across the immersive-media world: how much realism comes from the stars themselves, and how much from video-based simulation. That tension is especially relevant for planetariums, where the best experiences often blend precision with flexibility. A traditional opto-mechanical projector can still deliver an astonishingly convincing sky, while digital systems can expand the dome into a map, a spacecraft window, or a fly-through of the universe. The most effective renovations tend to protect both strengths rather than forcing a false choice between them. (physics.sfsu.edu)
The closure also has immediate consequences for teaching. Chris McCarthy, an adjunct assistant professor of exoplanetary science, told Golden Gate Xpress that the planetarium gives students a rare connection to the night sky that is hard to replicate in foggy, light-polluted San Francisco. During the shutdown, introductory astronomy labs will have to adapt, but the department expects to rely on alternate tools, including software simulations, until the dome reopens. The broader lesson is that planetariums are not just nostalgia machines; they are infrastructure for science literacy, and when they close, a campus loses a uniquely communal way of learning about the universe. (physics.sfsu.edu)
For the fulldome field, the SF State renovation is a familiar but important case study: a legacy dome updated for hybrid use, with a physical star projector still at the center of the experience and digital systems layered in around it. That combination—classic optics, modern visualization, and live instruction—captures where planetarium design is headed.
Originally reported by Golden Gate Xpress, SF State Development Office via hoodline.com on 2026-10-24 22:19:00.
Read the full original article here: hoodline.com