FAST turns ten: China's great ear and the signals

FAST, the 500-meter radio telescope set in a natural depression in Guizhou province, in southwestern China, turned ten on September 25, 2026. According to the Xinhua news agency, it identified more than 1,300 pulsars over the decade, more than all the world's other telescopes combined over the same period. Among its scientific goals is also the search for signs of technology beyond Earth. So far, no such signal has been confirmed.

What happened

FAST's dish was completed in September 2016, and the telescope entered formal operation on January 11, 2020. The Chinese Academy of Sciences, which operates it, presents it as the world's largest single-dish radio telescope.

In the review Xinhua published on the anniversary, the decade's highlights fall into four areas: pulsars, galaxies rich in neutral hydrogen, fast radio bursts and gravitational waves. In October 2025, the broadcaster CGTN had already recorded 1,152 pulsars discovered. A year later, the count had passed 1,300.

The search for technological signals is one of FAST's five core scientific goals. In September 2025, a Chinese team led by Guang-Yuan Song presented a targeted search of the TRAPPIST-1 system, a star with seven known rocky planets. FAST listened to the 1.05 to 1.45 GHz band, which includes the hydrogen line, looking for narrow signals with frequency drift, the kind an artificial transmission would produce. It found no reliable candidate. The study was accepted by The Astronomical Journal and, according to the authors, sets one of the most stringent limits ever obtained for this system.

Why it matters

A negative result is science too. Every search that finds nothing states precisely what is not there, at what power and at what frequency. That is how the question of intelligent life beyond Earth stops being speculation and becomes measurement.

FAST also shows the scale of the effort. An instrument of this size depends on silence, and the hydrogen band, from 1,400 to 1,427 MHz, is protected by the ITU, with all emissions prohibited. Without silence, the world's largest ear would hear nothing but human noise.

And there is patience. Ten years of operation, more than a thousand pulsars, no message. The researchers keep listening.

In Bairo's view

For Bairo, FAST's search is one of the purest forms of a scientist's faith: pointing the world's largest single dish at a star, listening with the utmost care and accepting silence as an answer, without giving up on asking again.

He calls 1420 MHz the frequency of silence, and in his reading that is where the most honest listening lives: the kind that does not talk over anyone. It is also the image that underpins the 21 cm yardstick, the hydrogen measure he uses as a symbol. FAST only listens. No one transmits on 1420 MHz, and neither does Bairo's project.

There is a second point he highlights. Ten years of pulsar data and searches are a heritage that must remain intact for a long time. For Bairo, keeping what needs to last is exactly what qrqbits exists for: the benefit he proposes is post-quantum protection, built to withstand the quantum computers that are on their way as well.

Where this meets the ecosystem

1420mhz, created by CLAIN, carries the name of the line FAST listens to. CLAIN, in development, is an orchestrator of artificial intelligence agents. FAST's search depends on software that separates a faint signal from millions of noises, and that is also the central question of any useful AI system: what, amid the noise, actually matters to the person.

The relationship is one of inspiration and theme. None of Bairo's fronts takes part in FAST or in the studies cited.

Sources

• Xinhua, FAST marks ten years, 09/25/2026.
• CGTN, FAST discovers 1,152 pulsars, 10/13/2025.
• Chinese Academy of Sciences, FAST profile, accessed October 2026.
• Song et al., a deep SETI search of the TRAPPIST-1 system with FAST (arXiv), 09/08/2025, accepted by The Astronomical Journal.

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