The NSF-DOE Vera C. Rubin Observatory marked a major milestone with the beginning of the Legacy Survey of Space and Time (LSST), a 10-year effort to capture the universe in unprecedented detail.
Lawrence Livermore National Laboratory (LLNL) engineer and former project manager for the LSST Camera, Vincent Riot reflected on the culmination of the project and the journey ahead.
Development of the world's largest digital camera began before Riot arrived at the Lab in 2003. For most of his career, he worked to build first-of-its kind optical components, including lenses that would later be recognized in the Guinness World Records.
"What was most exciting for me as the project manager for the camera was when we got the first-light images," said Riot. "You can zoom in almost infinitely."
The images, released in June 2025, gave scientists a glimpse of the observatory's reach and the scale of the data it is expected to collect over the next decade. Rubin is designed to repeatedly scan the visible sky, building a massive archive that people around the world can use to study everything from near-Earth objects to dark matter and dark energy.
Riot described the observatory as a kind of cosmic catalog, one that will grow with every pass of the telescope.
"You can think of it as Rubin is making the largest dictionary of the cosmos ever made by humankind, and they're going to make the data available to the scientific community and see what they can do with it," he said.
Unlike traditional observatories that respond to proposals for specific observations, Rubin is built as a survey instrument. The telescope will observe the same regions of sky repeatedly through six filters, designed by LLNL, to record changes over time and develop a public dataset of extraordinary size.
Data releases are expected every couple of years, and the archive is set to become a resource for researchers far beyond the Lab and observatory teams that built it. Especially with the rise of artificial intelligence, Riot said that there's a real chance for students or someone working in their garage to make a scientific discovery.
The filters developed by the team at LLNL are a critical element of enabling observations that could be transformational for astronomy and our understanding of the universe. Weighing about 90 pounds, each filter processes different segments of the electromagnetic spectrum to reveal the distance and age of the celestial bodies within its view.
Because Rubin is not a space telescope, certain wavelengths are absorbed by Earth's atmosphere before they reach the instrument. The filters were designed to work around those gaps, helping preserve the quality and consistency of the survey over time.
The team at Livermore designed the optics system out of fused silica, a material strong enough to withstand the full 10-year survey, with the greater risk lying in the mounting hardware and adhesives that hold components in place.
"If you were to send the lenses to space, you'd have to do all kinds of paperwork because it probably would not burn off, if it was to re-enter the atmosphere," Riot said.
He said that kind of long-term thinking was built into the project from the start. The work began years before he joined the Lab, and it will take a new generation of scientists to complete.
"Maybe my great grandchildren will be the scientists that actually use the data and find something," said Riot. "It's not crazy to think that 100 years from now they would still be finding groundbreaking discoveries from it."
