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DTN 178: Fermi Explorer plots interstellar mission

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04 Sep 2026 — 6 min read

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How AI plotted an interstellar journey to Alpha Centauri

“A nonprofit organization called the Fermi Explorer Mission announced today that it intends to launch a spacecraft to our nearest star system by the end of 2029.

It’s a hugely ambitious mission—if all goes well, the spacecraft could take up to 80,000 years to arrive at Alpha Centauri, which is 4.4 light-years away. And the spacecraft will follow a novel trajectory discovered by an AI system developed by Physical Superintelligence (PSI), an AI physics research lab. PSI is launching today with $58 million in funding led by Breakthrough Energy, a climate-focused investment group founded by Microsoft cofounder Bill Gates.

It’s not the first time this has been tried. In 2016, the billionaire tech investor Yuri Milner announced an interstellar mission called Breakthrough Starshot to launch humanity’s first spacecraft to Alpha Centauri. The plan was to use powerful lasers that would propel tiny probes to a fifth of the speed of light—fast enough to reach Alpha Centauri within 20 years. Milner pledged $100 million toward a proof of concept. But a decade later, nothing has launched.

“We didn’t want to do another Breakthrough Starshot,” says Philip Johnston, the cofounder and president of the Fermi Explorer Mission. “We’re dead set on something actually launching.” (via MIT Technology Review)

Saturn’s south pole boasts a newly discovered 10-sided polygon. Image: Space Telescope Science Institute Office of Public Outreach/NASA

“A team of astronomers discovered a strange polygonal atmospheric structure on Saturn near the planet’s south pole. This 10-sided shape, known as a decagon, joins one of the gas giant’s most famous features: a hexagon near the north pole that was first observed 44 years ago. Images of the new decagon were captured by the Hubble Space Telescope, and the discovery was recently published in the journal Science Advances.

The formations at both the north and south poles aren’t solid structures, like a wall or a rock formation. Saturn doesn’t even have a defined solid surface like Earth’s crust. If you were to descend through the atmosphere of the ringed planet, the pressure and density would progressively increase, but you would never reach a “ground” on which to land. Instead, what astronomers have witnessed are patterns formed by clouds, albeit very unusual ones.

Each side of the decagon measures approximately 16,800 kilometers, which is a few thousand miles longer than the diameter of Earth. Near the feature is a jet stream reaching speeds of 116 meters per second, or nearly 260 miles per hour. By way of comparison, a Category 5 hurricane—the most intense storm level possible on Earth—is defined by winds above 157 miles per hour. Interestingly, although the jet stream circulates at tremendous speed, the decagon pattern shifts at a mere 2.5 meters per second—less than 6 miles per hour. (via WIRED)