Founder, Chairman and CEO of Astra. I’m focused on improving life on Earth from space.

San Francisco, CA
Joined August 2008
Astra just delivered our first customer payloads into Earth orbit! I am so proud of the unwavering commitment of our incredible team. Thank you to our customers, shareholders, partners, and to @FAANews for helping us achieve this important milestone. #AdAstra @SpaceflightInc – at Alameda, CA
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I wish you could park it outside my place in London, but the parking ticket folks are vicious here
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Nearly a decade ago, Adam and I started Astra with a simple idea: launch shouldn’t be limited to a handful of places on Earth. Today, our next-generation rocket is sitting in the English countryside after crossing the Atlantic in standard shipping containers. The future of launch is everywhere.
Astra’s next-generation rocket just crossed the Atlantic. Rocket 4.0 arrived in the UK the same way it’s designed to launch: in standard shipping containers. Mobile. Containerized. Orbital. The future of launch is everywhere.
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We welcome the competition, @Peter_J_Beck. 100+ engines delivered last year, 100% on-orbit reliability — @Astra is leading in propulsion. Next up: returning to the pad. Rocket 4 is coming…
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Focus on what you can control. Build something, anything. A product, yourself, a family, your community, a team, a company or organization, relationships. Or help someone else do it. Don't complain or be a victim, ever. #PlayNiceButWin
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Chris Kemp retweeted
Honored to be included again. Our focus stays the same: doing the work that gets us back to the pad. #adastra
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Chris Kemp retweeted
Congrats, @johnkrausphotos! You've captured so many unforgettable Astra moments — we can't wait to watch where your lens goes next with @NASAAdmin.
I’m humbled and energized to bring my passion for photography and storytelling to NASA and work under @NASAAdmin Jared Isaacman as Special Communications Assistant to the Administrator. With my focus now fully on working alongside the best and brightest at NASA, my independent media coverage and for-hire work comes to an end. Thank you all for following along over the years! Be sure to follow NASA’s channels to see great content from across the agency. I have deep respect for NASA’s communicators and creatives, individuals whose work I’ve followed and admired for a long time. I’m profoundly grateful for the opportunity to work with them to help continue sharing NASA’s story with the widest audience possible and inspiring the next generation to look up to the stars. Under Administrator Isaacman’s leadership, we will do just that. John Kraus Special Communications Assistant to the Administrator NASA
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Congratulations @rookisaacman on your NASA confirmation! An exciting moment for NASA and the future of space exploration.
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In the evolving landscape of space and defense, financial resilience is key. Trae Stephens really hits home in this thoughtful read. @Astra
I grew up in Ohio where, for generations, my family worked for GM, Ford, NCR, Fujitec, and Frigidaire. We forgot that our ability to build is our greatest deterrent. It's time to bring manufacturing back to the Heartland. 🇺🇸 Check out my new essay for American Affairs 👇
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Super cool to see what some of our customers are doing in low Earth orbit!
Our TPUs are headed to space!  Inspired by our history of moonshots, from quantum computing to autonomous driving, Project Suncatcher is exploring how we could one day build scalable ML compute systems in space, harnessing more of the sun’s power (which emits more power than 100 trillion times humanity’s total electricity production). Like any moonshot, it’s going to require us to solve a lot of complex engineering challenges. Early research shows our Trillium-generation TPUs (our tensor processing units, purpose-built for AI) survived without damage when tested in a particle accelerator to simulate low-earth orbit levels of radiation. However, significant challenges still remain like thermal management and on-orbit system reliability.  More testing and breakthroughs will be needed as we count down to launch two prototype satellites with @planet by early 2027, our next milestone of many. Excited for us to be a part of all the innovation happening in (this) space!
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Our TPUs are headed to space!  Inspired by our history of moonshots, from quantum computing to autonomous driving, Project Suncatcher is exploring how we could one day build scalable ML compute systems in space, harnessing more of the sun’s power (which emits more power than 100 trillion times humanity’s total electricity production). Like any moonshot, it’s going to require us to solve a lot of complex engineering challenges. Early research shows our Trillium-generation TPUs (our tensor processing units, purpose-built for AI) survived without damage when tested in a particle accelerator to simulate low-earth orbit levels of radiation. However, significant challenges still remain like thermal management and on-orbit system reliability.  More testing and breakthroughs will be needed as we count down to launch two prototype satellites with @planet by early 2027, our next milestone of many. Excited for us to be a part of all the innovation happening in (this) space!
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ICBMs aren’t the only threat. Think millions of drones, forward-deployed in thousands of orbital rockets, launched from hundreds of mobile launchers deployed in dozens of countries. Golden Dome must be global, responsive, mass-produced, and unstoppable. @Astra is building the pipeline. 🚀 #EconSpace @alokjha
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More progress!
30+ second hotfire provides data in thermal steady state, allowing us to further optimize our new first stage engine combustion chamber.
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My thoughts on the incredible geopolitical power asymmetry created by integrating Rockets, Ai, Drones, and Satellites (RAIDS). The country that deploys RAIDS first at scale wins. Great discussion with @AnirudhSuri on The Great Tech Game - youtu.be/UQoV_WC1z8M?si=her1…
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Less parts, more power! Made in America by Astra.
Sound on! Here’s the recent hotfire of Astra’s most powerful Rocket 4 first stage engine.
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Which happens first, Thursday space news edition:
45%Rocket 4 reaches orbit
55%DreamChaser reaches orbit
2,231 votes • Final results
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“Success is not final, failure is not fatal: it is the courage to continue that counts.” — Winston Churchill
Astra plans mid-2026 first launch of Rocket 4 spacenews.com/astra-plans-mi…
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After many posts about satellite engines, we are excited to resume rocket engine testing!
Hotfire at our test facility in preparation for testing the new combustion chamber for the next-generation Astra first stage engine that will power Rocket 4.
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Chris Kemp retweeted
In case you missed it, catch Astra founder, chairman and CEO @Kemp in conversation with @ashleevance about the journey Astra has been on and what’s next. Watch the full interview here: youtu.be/I_I_TS-dZdc?si=2yXV…
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