We are trapped in a political black hole
In the high desert of San Juan, Argentina, a nearly completed radio telescope stands frozen—not by the forces of nature, but by the gravitational pull of great-power rivalry. The China-Argentina Radio Telescope, fifteen years and thirty-two million dollars in the making, has been halted by quiet American pressure on a government eager to align itself with Washington, leaving scientists to watch their life's work rust at the edge of completion. It is a parable of our age: the instruments built to peer beyond our world rendered inert by the conflicts within it.
- A $32 million telescope, 90% complete, sits idle in the Argentine mountains while its critical components gather dust in a Buenos Aires customs warehouse—stopped not by science, but by geopolitics.
- Washington has applied sustained, multi-channel pressure on Argentina, warning of dual-use risks and dispatching national security experts, while President Milei's close alignment with Trump has made Buenos Aires unusually receptive to American demands.
- Argentine astronomers fight back with technical arguments—the dish tracks stars a hundred times too slowly to follow satellites and carries no transmitter—but find that scientific logic carries little weight in a security-driven debate.
- The same pattern is playing out across the region: a Chinese-backed $80 million telescope project in Chile's Atacama Desert faces parallel obstruction, forcing Latin American nations into an increasingly untenable position between their largest trading partner and their security patron.
- Scientists warn the telescope risks becoming scrap metal, while diplomats caution that subordinating national interest to great-power games carries its own long-term cost for Argentina.
In the mountains of San Juan province, a forty-meter radio dish sits unfinished against the night sky. The China-Argentina Radio Telescope—CART—was designed to be South America's largest, offering a southern-hemisphere window onto galaxies, pulsars, and star formation invisible from China. Instead, it has become a monument to geopolitical friction. Its components have been stranded in a Buenos Aires customs warehouse since September 2024, and construction has quietly stopped.
The project began fifteen years ago as a $32 million partnership between Argentina's National University of San Juan and China's National Astronomical Observatory. The site at El Leoncito was chosen for its clear skies, low humidity, and electromagnetic silence. By late 2025, engineer María Verónica Benavente estimated the telescope was ninety percent complete. "We are very close," she said. "That is why what is happening is so difficult—we do not want this to become scrap metal."
No formal order halted the work. The answer came in fragments: the United States opposed it. Washington had raised concerns as far back as 2021, when national security advisor Jake Sullivan flagged CART alongside a Chinese-backed port and a satellite station in Neuquén. Pressure continued under the new administration—Secretary of State Marco Rubio discussed "space collaboration" with Argentine officials in early 2025, and experts from Sandia National Laboratories traveled to Buenos Aires to warn of risks. When President Milei's government decreed that the Defense Ministry must approve all observatories and aerospace systems, scientists read it as a measure aimed squarely at CART.
Argentine astronomers rejected the dual-use framing. Erick González explained that the telescope tracks stellar movement at roughly one hundred times too slow a speed to follow satellites, and that it carries no transmitter—the essential component for radar function. The Defense Ministry had already approved the project in 2016. Project coordinator Marcelo Segura, who had learned Mandarin to work with his Chinese colleagues, tried to persuade American authorities the instrument was purely civilian. "It did not work," he said. Astronomer Ana María Pacheco put it plainly: "We are trapped in a political black hole."
Argentina is not alone. In Chile's Atacama Desert, a Chinese-backed plan for roughly one hundred telescopes on Cerro Ventarrones faces similar obstruction. The U.S. ambassador to Chile during the Biden years described blocking the project as one of her most urgent priorities. Part of the concern centered on the initiative's inclusion in China's Titian program—a state scientific effort designed to scan both hemispheres every thirty minutes to "serve national strategic needs." Chile ultimately ruled that its laws barred a private university from signing such international agreements.
The bind facing both countries reflects a broader regional dilemma. Argentina's Milei arrived in power with hostile rhetoric toward China, yet Chinese exports to Argentina surged sixty-six percent in the past year. Former ambassador José Octavio Bordón warned that while Milei's rapport with Trump offered diplomatic openings, using that relationship to subordinate Argentine interests to American strategic games would carry its own cost. Researcher Andrés Bórquez noted that Latin American nations had long tried to maintain "strategic ambiguity" between the two powers—but that as both become more assertive, the middle ground is disappearing.
For now, the telescope structure stands still in San Juan, its future suspended between two competing visions of what Argentina's place in the world should be.
In the mountains of San Juan province, Argentina, a forty-meter dish of metal and ambition sits motionless against the night sky. The China-Argentina Radio Telescope, or CART, was meant to become the largest instrument of its kind in South America—a window onto distant galaxies, pulsars, and the formation of stars. Instead, it has become a monument to geopolitical friction, its skeleton incomplete, its essential components locked in a customs warehouse in Buenos Aires since early September 2024.
The project began fifteen years ago as a $32 million collaboration between Argentina's National University of San Juan and China's National Astronomical Observatory. The location in El Leoncito was chosen with scientific precision: clear skies, minimal light pollution, low humidity, and electromagnetic silence. From the southern hemisphere, the telescope could observe regions of the cosmos invisible from China. When metal pieces began arriving in 2023, the work moved forward steadily. By late 2025, the project coordinator Marcelo Segura reported the telescope was between fifty and sixty percent complete, with eighty percent of assembly finished. Engineer María Verónica Benavente put the figure higher—ninety percent done, she told Science magazine. "We are very close. That is why what is happening is so difficult, because we do not want this to become scrap metal."
Then the work stopped. No official communication arrived. No formal order. Just silence from Buenos Aires, and components stranded at the port. When Segura tried to understand why, the answer came in fragments: the United States government opposed the project. The alignment was clear—Argentina's new president, Javier Milei, had cultivated a close relationship with Donald Trump, and Washington had made its position known through multiple channels over multiple years. In August 2021, national security advisor Jake Sullivan and White House Latin America director Juan González had raised concerns with then-president Alberto Fernández about several Chinese-backed initiatives in Argentina: the telescope, a port in Ushuaia, and a satellite control station built in 2015 in Neuquén, its 450-ton antenna a visible symbol of Chinese presence in the region. The pressure continued. In February 2025, Secretary of State Marco Rubio discussed "space collaboration" with Argentine Foreign Minister Gerardo Werthein. Experts from Sandia National Laboratories traveled to Buenos Aires to warn of risks. Washington pushed for clauses guaranteeing "exclusively civilian" use of space facilities. In October 2025, Milei's government decreed that the Defense Ministry must approve any installation of radars, observatories, or aerospace systems—a measure scientists interpreted as aimed directly at CART.
The American concern centered on dual-use technology: the fear that a telescope could serve military purposes, that it might feed into China's broader technological expansion across Latin America. But Argentine astronomers pushed back. Erick González, from the National University of San Juan, explained to DW that the radiotelescope was designed to track the apparent movement of stars—a speed roughly one hundred times slower than what would be needed to track satellites. "Its military use would be very limited," he said. "Moreover, military use of a radiotelescope depends mainly on whether it has a transmitter to function as radar. This radiotelescope has no transmitter." The mountains surrounding the installation blocked most views of the earth's surface anyway. The Defense Ministry had already approved the project in 2016. Yet the new requirements stood. Segura, who had learned Mandarin to discuss the telescope's operation with his Chinese colleagues, tried to convince American authorities the instrument would be used only for civilian science. "It did not work," he said. Astronomer Ana María Pacheco summed up the situation with a metaphor: "We are trapped in a political black hole."
Argentina was not alone. In Chile's Atacama Desert, a Chinese-backed astronomical project valued at roughly eighty million dollars faced similar obstacles. The plan called for about one hundred telescopes on Cerro Ventarrones in the Antofagasta region, a collaboration between the Catholic University of the North and China's National Astronomical Observatory. Chilean scientists would have limited access—authorization to use the facilities only two nights per month. The U.S. ambassador to Chile during the Biden administration, Bernadette Meehan, acknowledged discussing the matter directly with Chilean authorities. "For the U.S. government it was very important that the project not be authorized," she said, describing it as one of her most urgent priorities. Part of the concern may have stemmed from the project's inclusion in China's Titian Initiative, a state scientific program designed to "completely scan" the skies of both hemispheres every thirty minutes to "serve national strategic needs." In April 2025, Chile's Foreign Ministry told Newsweek that the country's laws did not permit a private entity like the Catholic University to sign international agreements of this type. The Chinese embassy in Santiago responded by accusing the United States of "pure and simple hegemony and a new Monroe Doctrine," noting that Washington operates its own telescopes in Chile.
Meanwhile, Argentina navigated an impossible balance. Milei had arrived in power in 2023 with openly hostile rhetoric toward China, yet Chinese exports to Argentina had surged sixty-six percent in the past year. Electric vehicle brands like BYD were advancing rapidly in the Argentine market thanks to zero tariffs the government promoted. José Octavio Bordón, former president of the Argentine Council on International Relations and former ambassador to the United States, told DW that Milei's relationship with Trump offered diplomatic opportunities—but warned of the cost. "If the president feels comfortable with Donald Trump and the U.S. government, that is his right," Bordón said. "But he should use that relationship to develop the best foreign policy possible, in line with Argentina's interests, not to subordinate himself to the games of a great power." Researcher Andrés Bórquez, who studies China's impact on Latin America, explained to the South China Morning Post that countries like Chile had tried for years to maintain "strategic ambiguity," balancing economic ties with China against security cooperation with the United States. "But as both powers become more assertive, navigating that middle ground becomes increasingly difficult."
For now, the telescope structure remains still in San Juan. Components sit in customs. The future of CART is uncertain, suspended between two competing visions of what Argentina's role in the world should be.
Citações Notáveis
We are very close. That is why what is happening is so difficult, because we do not want this to become scrap metal.— Engineer María Verónica Benavente, National University of San Juan
For the U.S. government it was very important that the project not be authorized.— Bernadette Meehan, former U.S. ambassador to Chile
A Conversa do Hearth Outra perspectiva sobre a história
Why does a telescope matter so much to Washington? It's just a scientific instrument.
Because it's not just a telescope. It's a symbol of technological reach. If China can build major research infrastructure in Argentina, it signals influence—access to data, relationships with local scientists, a foothold in the hemisphere.
But the scientists say it can't be used militarily. The engineers checked the design.
They're right about the technical limitations. But Washington isn't entirely convinced by technical arguments when geopolitics is at stake. The concern is less about what this specific telescope can do and more about the pattern it represents.
So Argentina is caught between two superpowers.
Exactly. Milei wants to align with Trump, but Argentina also needs Chinese investment and markets. The telescope became the place where those two pressures collided—and the scientists got stuck in the middle.
What happens to the project now?
It sits. The components stay in the port. The work stops. And the scientists watch their nearly-finished instrument become a symbol of something it was never designed to be.