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Fermi Explorer proposes AI-planned probe toward Alpha Centauri
Tracks Fermi Explorer's proposed interstellar mission, PSI's trajectory-design contribution, and progress toward launch within its cost and hardware constraints.
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Overview
Fermi Explorer proposes a small probe targeting launch by 2029 and an approximately 80,000-year journey toward Alpha Centauri. Philip Johnston credits Physical Superintelligence with rapidly finding a workable trajectory. Alex now describes the stated objective as reaching at least 99% of the distance, while speculating that onboard guidance could deliver an actual system encounter. Guidance plans, launch execution and long-term feasibility remain unproven.
Recent coverage
Changes to our coverage published in the past seven days. These are site update dates; podcast discussion dates and sources are in each version.
No changes to this account were published in the past seven days.
What changed
Dates show when each podcast discussion was published.
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New information
Alex clarifies the mission's stated 99%-distance objective and explicitly labels active onboard guidance and an actual Alpha Centauri encounter as his speculation, not official commitments.
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New information
Johnston and PSI described an AI-generated trajectory that first slows the probe to lower its solar approach, then exploits thrust near the Sun. They framed the speed of design, rather than wholly new propulsion physics, as the breakthrough.
Podcast discussions
- Moonshots with Peter Diamandis GPT-6 Astra Saturates ARC-AGI-3, Tesla's $30K Cybercab Floods Austin, Anthropic Proves Fermat's Last Theorem | EP #286Sep 5, 2026
- Moonshots with Peter Diamandis Humanity's First Star Probe, Architect Labs Beats NVIDIA 3.4x, Musk Wants Satellites to Cool Earth | EP #285Sep 2, 2026
Sources
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Our coverage
PSI's AI found a cheap trajectory to Alpha Centauri in a week
PSI's AI found in a week a cheap Alpha Centauri route that eluded StarCloud's Philip Johnston for six months: slow down, fall toward the sun, thrust at perihelion. The sub-$15M probe would take roughly 77,500 years and miss by about 2,600 AU.
Version history
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Sep 15, 2026 · Version 2
Alex clarifies the mission's stated 99%-distance objective and explicitly labels active onboard guidance and an actual Alpha Centauri encounter as his speculation, not official commitments.