When people see actual hardware that will travel millions of miles
Twice each year, the gates of one of humanity's most ambitious scientific institutions open to let ordinary people walk among the machines built to explore other worlds. On October 10th and 11th, NASA's Jet Propulsion Laboratory in Pasadena will host Explore JPL, inviting the public into the laboratories where robotic spacecraft are conceived and constructed. It is a rare moment when the distance between citizen and cosmos collapses — when the work of understanding the solar system becomes something a person can see, touch, and ask questions about. These encounters matter not only for what they teach, but for what they awaken.
- For most of the year, JPL operates behind security gates as a restricted research campus — Explore JPL is one of only two chances the public gets to step inside.
- The event is not a passive exhibit but a live encounter: visitors move through active labs, see spacecraft under construction, and speak directly with the scientists and engineers doing the work.
- At a time when space programs face persistent funding pressures, events like this carry weight beyond inspiration — they make the case to the public and to policymakers that this work is worth sustaining.
- Thousands of visitors are expected across the two October days, and for many — especially young people — the experience may quietly redirect the course of a career or a life.
On October 10th and 11th, NASA's Jet Propulsion Laboratory in Pasadena will open its gates to the public for Explore JPL, a biannual event that turns one of the nation's most consequential space research facilities into a place anyone can visit. Nestled in the San Gabriel Mountains northeast of Los Angeles, JPL is where the rovers that crossed Mars and the probes that reached the outer planets were designed and built. For most of the year, it is closed to the public. Twice annually, that changes.
Explore JPL is not a museum tour. Visitors move through active laboratories and engineering spaces, see spacecraft in various stages of construction, and speak directly with planetary scientists about what missions to Mars, Venus, and beyond have revealed. It is a deliberate encounter between the people who do this work and the public whose tax dollars make it possible.
The value of these events extends well past a single weekend. When people stand next to hardware that will travel millions of miles from Earth and hear engineers describe the problems they've solved, something shifts in how they understand what's possible. Seeds get planted — in children, but in adults too — that can grow into lasting engagement with science and engineering.
The event arrives at a moment when public enthusiasm for space exploration remains strong even as funding pressures persist. For the thousands who will walk through JPL those two days in October, the experience is likely to reshape how they think about NASA's work — and why it deserves their support.
On October 10th and 11th, the gates of NASA's Jet Propulsion Laboratory in Pasadena will swing open to the public for Explore JPL, a biannual event that transforms one of the nation's most consequential space research facilities into a place where ordinary people can walk the same halls where rovers are built and distant planets are studied.
The Jet Propulsion Laboratory, nestled in the San Gabriel Mountains northeast of Los Angeles, is where NASA designs and operates the robotic spacecraft that have fundamentally changed our understanding of the solar system. The rovers that have crawled across Mars, the probes that have ventured to the outer planets, the instruments that peer back toward the beginning of time—many of them were conceived and built here. For most of the year, the facility operates as a restricted research campus. But twice annually, JPL opens its doors to let the public see what happens behind the security gates.
Explore JPL is not a museum tour. Visitors will move through active laboratories and engineering spaces where scientists and engineers are actively engaged in the work of space exploration. The event is designed as a direct encounter between the people who do this work and the public whose tax dollars fund it. You can see spacecraft under construction. You can speak with planetary scientists about what they've learned from missions to Mars, Venus, and beyond. You can watch demonstrations of the technologies that make deep space exploration possible.
These open house events serve a purpose that extends well beyond a single weekend. They are a form of public engagement that strengthens understanding of space science across the broader population. When people walk through a laboratory and see the actual hardware that will travel millions of miles from Earth, when they hear directly from engineers about the problems they solve and the innovations they've developed, something shifts in how they think about what's possible. The experience often plants seeds—in young people especially, but in adults too—that can grow into lifelong interest in science and engineering.
The timing of Explore JPL reflects a moment when public interest in space exploration remains high, even as the challenges of funding and sustaining these programs persist. Events like this one remind both the public and policymakers why this work matters. They demonstrate that space exploration is not an abstract pursuit conducted by distant specialists, but a tangible human endeavor that requires creativity, persistence, and resources. For the thousands of people who will walk through JPL on those two days in October, the experience will likely reshape how they think about what NASA does and why it deserves support.
The Hearth Conversation Another angle on the story
Why does JPL open its doors only twice a year? Why not more often?
Security and operational continuity matter at a research facility this sensitive. But there's another reason—these events require real planning and staff time. Scientists have to step away from their work to engage with visitors. JPL has chosen a rhythm that balances public access with the need to keep the research moving forward.
What's the actual draw for someone visiting? Is it just looking at hardware?
It's the encounter with the people. You can see a rover, sure, but you can also talk to the engineer who designed its wheels, or the scientist who interprets data it sends back. That direct conversation—that's what changes how people think about space exploration.
Does JPL track whether these events actually inspire people to pursue careers in science?
Not formally, as far as the public record shows. But anecdotally, institutions like this know that exposure matters. A teenager who walks through a lab and sees real spacecraft being built is more likely to take science seriously, to pursue engineering in college. It's not a guaranteed pipeline, but it's a seed.
What happens if someone visits and realizes they don't care about space exploration?
That's fine too. Not everyone will be moved by it. But JPL's bet is that enough people will be—enough that it's worth opening the doors, worth the disruption to the workday, worth the effort to help the public understand what they're funding.