A rare view inside the space lab
On October 10 and 11, 2026, NASA's Jet Propulsion Laboratory in Pasadena, California, is holding Explore JPL, a free open-house event marking 90 years of the laboratory's scientific and engineering history. The weekend is an opportunity for registered visitors to look beyond rocket-launch headlines and see some of the facilities, machines and people behind interplanetary missions. This is not a claim that the entire campus or every spacecraft is open to unrestricted public access. The official programme divides the experience into four thematic areas, giving guests a structured glimpse of how spacecraft are designed, assembled, operated and tested.
What visitors can actually see
NASA describes four themes called Missions That Changed the World, Moon to Mars, In Flight and Makerspace. Highlights include the Space Flight Operations Facility, often nicknamed the Center of the Universe, where teams communicate with robotic explorers across the Solar System. The itinerary also advertises the Spacecraft Assembly Facility, precision engineering work in the Machine Shop, and demonstrations of robotics research. Full-scale models of celebrated spacecraft, including the Perseverance Mars rover, help guests compare the machines pictured in news reports with their actual dimensions. Specific experiences can have capacity constraints or operating limitations.
Why JPL's 90th birthday matters
The laboratory traces its origins to rocket-propulsion research in 1936, well before NASA's establishment in 1958. JPL later helped launch Explorer 1, America's first satellite, and became a central organisation in robotic planetary exploration. Its mission history includes Voyager, Galileo, Cassini, Mars rovers and Europa Clipper. The anniversary therefore represents a long arc from ground-based engineering experiments to equipment operating millions or billions of miles from Earth. An open house makes that timeline tangible: the precision needed to machine a part on Earth connects directly to the reliability required when repairing a spacecraft is impossible.
Can you still get a free ticket?
The official Explore JPL website says the main supply of tickets has been reserved. That is a crucial condition for anyone discovering a viral post on the day of the event: this is not a guaranteed walk-in attraction. Cancellations may release tickets through the official reservation system, but availability is unpredictable and JPL says there is no waiting list. Tickets are assigned to named guests and times, with a maximum of five per reservation. Adults aged 18 and over need government-issued identification matching the name printed on their ticket. An online resale promise should be treated cautiously because tickets are not transferable or for sale.
The correct hours and arrival rules
JPL lists Saturday, October 10, and Sunday, October 11, from 9:30 a.m. to 4:00 p.m. Pacific local time as the event hours. Visitors should not arrive before their assigned entry slot, and campus access is subject to security screening. NASA says backpacks and most bags are restricted, while small purses and diaper bags have exceptions; professional camera equipment with detachable telephoto lenses is also restricted. Parking is free, according to the official announcement. Anyone planning a visit should read the full FAQ rather than assuming rules that apply at a museum or public park also apply to a working research facility.
The best alternative if tickets are unavailable
JPL's official website provides a virtual tour, and NASA offers extensive mission pages, photographs, videos and educational resources that can be explored without travelling to Pasadena. The Space Flight Operations Facility and rover programmes are especially useful starting points for students interested in coding, engineering and planetary science. A virtual experience is not equivalent to entering the physical Machine Shop, but it can reveal why robotics, communications and miniaturised instruments are indispensable in deep space. Families should avoid unauthorised ticket sellers and use the confirmed JPL site for all registration and visitor instructions.
What this event does and does not prove
The laboratory's open house is a confirmed NASA event, but every exciting machine displayed is not necessarily a newly announced mission. A full-size rover replica should not be described as a live spacecraft returned from Mars, and a robotics demonstration is not evidence that the technology is already operating on another planet. Similarly, no article can promise that a last-minute visitor will be admitted after tickets have sold out. This October 11 report focuses on the verified event, the science behind its attractions and realistic ways to participate. NASA's own event and FAQ pages remain authoritative for changes on the day.