A new non-profit mission called Fermi Explorer has emerged with an ambitious plan to send a spacecraft to Alpha Centauri, the nearest star system to our own. If successful, it would mark a historic achievement as the first human-built object explicitly aimed for another star and the sixth to leave our solar system.
The mission is the brainchild of the team behind Starcloud, a startup planning to operate a fleet of GPUs in orbit. The Fermi Explorer team includes Starcloud founders Philip Johnston, Adi Oltean, and Ezra Feilden, along with program manager Garret Jameson. The non-profit is seeking partners, donations, and advice as it works toward an ambitious 2029 launch date.
The scale of interstellar travel presents extraordinary challenges. Alpha Centauri sits 41 trillion kilometers away from Earth, a distance that puts the journey in stark perspective. For comparison, Voyager, which was launched in 1977, is now about 26 billion kilometers from Earth after nearly five decades of travel. The Fermi Explorer spacecraft will take approximately 80,000 years to reach its destination.
The mission takes a deliberately practical approach, focusing on proven space technologies rather than breakthrough innovations. The spacecraft will carry a 10 centimeter square payload weighing just 1 kilogram. Using electric propulsion, the vehicle will be slingshot into a series of orbits that will eventually send it on a path bound for Alpha Centauri. The spacecraft is designed to remain active for about 12 years before entering a coast phase for the remainder of its journey.
With an estimated cost of about $15 million, Fermi Explorer represents a modest investment compared to previous interstellar ambitions. The mission stands in contrast to Breakthrough Starshot, a non-profit founded in 2016 by Yuri Milner and backed by Mark Zuckerberg, which envisioned a multi-billion dollar effort using novel laser-based propulsion to reach Alpha Centauri in 20 to 30 years. That ambitious project collapsed in 2025.
Johnston explained the mission’s philosophy, noting that unlike other interstellar missions that attempt to achieve their goals within a human lifetime through expensive propulsion research programs, Fermi Explorer has deliberately chosen the 80,000 year timeframe as the minimum viable mission. The team is hell-bent on actually launching something within three years rather than pursuing decades of development.
The spacecraft’s long-term survival is based on the principle that if dinosaur bones can last 200 million years, a metal box can survive the expected radiation environment for 50,000 years. The team does not plan to power the spacecraft up at the end of the 80,000-year journey. Instead, they hope that a future human civilization will intercept it, echoing the spirit of exploration embodied by Voyager’s Golden Record.
The non-profit is currently soliciting vendors to build the vehicle, funding to support construction, and scientific and artistic payloads to send along on this historic journey. The mission aims to achieve a historical first while testing the limits of the Fermi paradox, which attempts to explain why humanity has yet to find other intelligent life in the universe.
