When Perseverance arrives on Mars early next year, it will be the first landfall for a rover carrying 3D-printed metal parts and a small victory for proponents of the technique in the high-cost, high-risk world of the U.S. aerospace program.

NASA's Jet Propulsion Laboratory, nestled in the foothills of La Cañada Flintridge, has seen a slow cultural shift over the last decade toward the adoption of 3D printing techniques, more formally known as "additive manufacturing," in spacecraft design. The technology uses lasers to melt metal powder that is layered to precise computer modeling, until that metal takes the shape of whatever engineers need.

For years, 3D printing has been relegated to the realm of nerdy hobbyists, but its adoption by startups and big business has helped push NASA leaders toward accepting more innovation despite the risks. These days, 3D printing has been used on airplane engines, houses, hearing aids, chocolates, Tesla car components and even a pair of Adidas shoes.

"I have seen a 3D printed burrito, and it didn't look as delicious as Chipotle," said Scott Roberts, a JPL materials technologist, with a laugh.

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Relativity Space co-founder and CTO Jordan Noone announced on Twitter Wednesday that he began a transition to the role of executive advisor earlier this week "in preparation for starting my next venture."

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Techstars Starburst Space Accelerator's latest class announced partnerships with NASA's Jet Propulsion Laboratory, Maxar Technologies and Israel Aerospace Industries (IAI) North America, among others, at Wednesday's long-awaited showcase. It was the culmination of months of focused and sometimes grueling remote work.

The program aims to help companies achieve several years of commercial growth within three months, with mentorship from the accelerator's partners, including the U.S. Air Force, NASA Jet Propulsion Laboratory (JPL), Lockheed Martin, Israel Aerospace Industries North American (IAI), SAIC and Maxar Technology.

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