Starcloud founders plan spacecraft's 80,000-year interstellar trip

The founders behind Starcloud, a startup with plans to operate a fleet of GPUs in orbit, have a new pitch for potential investors: a plan to send a tiny spacecraft on an 80,000-year journey to Alpha Centauri. If they succeed, it would be the first human-built object explicitly aimed at another star, and the sixth to leave our solar system. Dubbed Fermi Explorer, the nonprofit behind the mission emerged today to ask for partners, donations, and advice. The initial team — Starcloud founders Philip Johnston, Adi Oltean, and Ezra Feilden, along with program manager Garret Jameson — has put together a plan to use proven space technologies to send a vehicle with a 10-centimeter-square, 1-kilogram payload into interstellar space.

The founders say they are launching the mission in the spirit of human exploration, to achieve a historical first, and to test the limits of the Fermi paradox, which attempts to explain why we have yet to find other intelligent life in the universe and gives the mission its name. The mission is intended to cost about $15 million and plans to launch in 2029; the nonprofit is soliciting vendors to build the vehicle, funding to pay them, and scientific and artistic payloads to send, in the spirit of the sensors and Golden Record onboard NASA’s Voyager probe, the first human spacecraft to leave the solar system.

Most interstellar-exploration plans stumble on the vast distances involved: Voyager, launched in 1977, is now about 26 billion kilometers from Earth, while Alpha Centauri, the nearest star to our solar system, is 41 trillion kilometers away. The last major Silicon Valley attempt, Breakthrough Starshot, founded in 2016 by Yuri Milner and backed by Mark Zuckerberg, envisioned a multibillion-dollar laser-propulsion system to reach Alpha Centauri in 20 to 30 years; the effort collapsed in 2025. Fermi Explorer takes the opposite approach, using existing technology rather than pushing a propulsion frontier. “We are hell-bent on actually launching something in three years,” Johnston said, adding that Fermi Explorer deliberately picked 80,000 years as “the minimum viable mission” rather than pursuing the billion-dollar propulsion research most interstellar missions require.

The plan is to launch the spacecraft on a rocket rideshare, then use efficient but low-power electric propulsion to slingshot the vehicle into a series of orbits that will eventually send it toward Alpha Centauri; the spacecraft would stay active for about 12 years before entering a final coast phase. “If a dinosaur bone can last 200 million years, then a metal box can easily survive the radiation environment we expect for 50,000 years,” Johnston said. “We don’t plan on powering the spacecraft up at the end of the 80,000 years. We hope that a future human civilization will intercept it.”

Why it matters

Fermi Explorer bets that interstellar exploration doesn’t need a propulsion breakthrough, just the willingness to launch something today and let a mission play out over tens of thousands of years — a wager on patience over Silicon Valley’s usual pace.