Chinese Telescope Projects Stall in Argentina and Chile Amid US Space Rivalry

A $32 Million Telescope Waits for Its Missing Parts

A radio telescope measuring 40 meters across stands unfinished at the Carlos U. Cesco Observatory in El Leoncito, Argentina. Key components have spent months in customs warehouses while authorities review the agreement behind the approximately $32 million project. Across the Andes in Chile, an $80 million observatory complex planned to contain about 100 telescopes has also been suspended.

As of May 12, 2026, both projects have become flashpoints in the rivalry between the United States and China. Washington has pressed Argentina and Chile over concerns that facilities presented as scientific observatories could also support Chinese military operations in space. Beijing rejects that accusation and says the United States is interfering with legitimate research and the decisions of sovereign countries.

The disputes involve the China Argentina Radio Telescope, known as CART, and the proposed Ventarrones Astronomical Park in Chile's Atacama Desert. Both bring Chinese astronomical institutions together with local universities. Scientists had expected new opportunities to study the universe, monitor objects approaching Earth and train students. Instead, construction and research plans are caught in diplomatic negotiations.

Argentina cites procedural irregularities and outstanding paperwork for its pause. Chile is reviewing whether its project meets regulatory requirements. Neither dispute has a stated resolution date. For the host countries, the decisions involve scientific access, control over infrastructure and relationships with two major powers whose competition increasingly extends into space.

Why the Andes Matter to Both Sides

The Andean deserts combine high altitude, extremely dry air and little light pollution. Thin air and clear, dark skies help astronomers observe distant galaxies, track asteroids and study radio signals from deep space. Chile's Atacama Desert also offers unusually stable atmospheric conditions and many cloudless nights. It hosts roughly 70 percent of the world's largest telescopes.

South American observatories provide views that facilities in Europe or Asia cannot obtain. They allow researchers to study the Magellanic Clouds, the center of the Milky Way and other southern celestial regions. The Southern Hemisphere sky has remained less charted than the northern sky for centuries, making these locations valuable to international research.

The same equipment can have strategic uses. Instruments built to examine celestial objects can also monitor satellites and orbital debris. Knowing where satellites are and how they move matters to scientific work and to military operations that depend on communications and other services in space.

Washington argues that this overlap creates opportunities for China to develop military capabilities through academic partnerships. Beijing says security allegations are being used to obstruct scientific cooperation. Argentina and Chile must decide what oversight and access they require while protecting research opportunities and managing their diplomatic and economic interests.

Argentina's Unfinished Radio Dish

CART is a partnership between the National University of San Juan and the National Astronomical Observatory of China, which operates under the Chinese Academy of Sciences. Located in Argentina's San Juan province, the telescope was designed to work across multiple frequency bands, allowing it to receive different types of radio signals.

Construction progressed far enough to leave a large white antenna structure, about 130 feet in diameter, rising above the mountain landscape. Essential equipment remains in Argentine customs warehouses. Authorities have held the components for months while examining administrative aspects of the bilateral agreement.

The Argentine government has attributed the delay to procedural irregularities and missing paperwork. It has made no official statement directly attributing the halt to American intervention, although diplomatic sources have confirmed repeated expressions of concern from Washington to Buenos Aires.

Ana Maria Pacheco, an astronomer involved in the project, described the frustration facing researchers:

We have fallen into a political black hole.

The unfinished structure also contains ordinary remnants left by Chinese engineering teams in its basement. Those traces of construction remain while scientists wait for the equipment needed to complete the facility. The delay has interrupted a project intended to strengthen the Southern Hemisphere's relatively limited radio astronomy infrastructure.

American Pressure Across Two Administrations

US concerns about Chinese space infrastructure in Argentina have continued across presidential administrations. Former White House National Security Adviser Jake Sullivan reportedly raised worries in 2021. Secretary of State Marco Rubio discussed space cooperation with Argentine officials in early 2025, after President Donald Trump returned to office.

Washington also sent experts from Sandia National Laboratories to brief Argentine authorities on possible risks. A subsequent bilateral trade agreement included provisions requiring Argentina to ensure that space projects involving other countries serve purely civilian purposes under American oversight.

In Chile, Bernadette Meehan, the US ambassador during the Biden administration, reportedly treated blocking the Ventarrones development as a top priority. The Trump administration maintained that pressure. Brandon Judd, the nominee for ambassador to Chile, pledged to limit Chinese access to Chilean resources and demonstrate American superiority as a partner.

The sequence connects the current suspensions to a dispute that developed over several years:

• 2015: China completed the Espacio Lejano Station in Argentina's Neuquen province, a facility that became a longstanding focus of US concern.
• 2021: Jake Sullivan reportedly raised concerns about Chinese space cooperation with Argentina.
• November 2024: Brazil agreed to expand space cooperation with China and join its Thousand Sails satellite constellation program.
• Early 2025: Marco Rubio discussed space cooperation with Argentine officials.
• April 2025: Chinese Ambassador Niu Qingbao publicly criticized US intervention in the Chilean observatory project.
• May 12, 2026: CART remains unfinished and the Ventarrones proposal remains suspended for review.

The continuity between the Biden and Trump administrations shows that American objections have persisted despite the change in political leadership. Scientists in both countries face decisions shaped by security concerns as well as the administrative requirements governing their projects.

Chile Reviews a Park of About 100 Telescopes

China's National Astronomical Observatory partnered with the Catholic University of the North to develop the Ventarrones Astronomical Park in the Atacama Desert. The approximately $80 million complex was planned to contain about 100 telescopes and monitor objects near Earth, including asteroids and comets.

That work was intended to supply early warning information for planetary defense. In simple terms, observing the movement of an asteroid or comet helps scientists assess where it is heading and whether its path could threaten Earth.

The Chilean government suspended the project for review following sustained inquiries from American authorities. Government spokesperson Aisen Etcheverry confirmed that discussions continued with the university and its Chinese partners about bringing the project into line with regulatory requirements.

Niu Qingbao, China's ambassador to Chile, held a press conference in Santiago in April 2025 to criticize Washington's role. He accused the United States of interfering with Chile's sovereign right to choose its international partners and spreading false information about the initiative. He also compared the planned facility with observatories funded by American entities in the region, including the Rubin Observatory.

Niu called for Chile to allow the project to proceed:

We are closely monitoring the developments of the incident and hope that the Chilean side can eliminate US interference and approve the implementation of the project as soon as possible.

The US State Department offered no immediate response to those statements. Chile's continuing discussions leave the university and its partners waiting for a decision on whether, and under what conditions, the proposed park can move ahead.

Why Washington Sees a Military Risk

American officials point to the potential for large radio dishes and optical telescope arrays to serve civilian and military purposes. Radio astronomy and satellite monitoring involve related principles of receiving and examining signals. Optical instruments can also observe objects in orbit, giving their operators information about satellite locations and movements.

The Espacio Lejano Station in Neuquen is central to Washington's concerns. Completed in 2015 by a space agency linked to the Chinese military, it provides tracking and control services for satellite operations based in Beijing. It occupies land leased without rent for 50 years, under agreements stating that Argentine authorities will not interfere with normal activities.

US policymakers have long viewed that station as evidence of China's strategic presence in the Western Hemisphere. They see the proposed Andean observatories as part of a broader pattern of infrastructure whose scientific purposes can overlap with security interests.

Intelligence assessments suggest that Ventarrones could eventually join China's Sitian Project. That global surveillance initiative is designed to scan both hemispheres every 30 minutes to meet national strategic needs. A network covering northern and southern skies would give its operators repeated observations across a much wider area than a single observatory could cover.

Liza Tobin, a former China Director at the US National Security Council, described her concerns about the Chilean project:

What we're seeing in Chile is textbook Chinese strategy. Establish seemingly benign scientific facilities that can serve multiple strategic purposes. These observatories don't just track stars, they can monitor satellites, gather intelligence, and support military space operations. Beijing deliberately obscures these military applications behind a veneer of civilian research and international scientific cooperation.

A US Southern Command spokesperson said agencies operating such sites function as extensions of China's military arm. The command's concerns include potential disruption of American and allied communications, support for targeting hypersonic weapons, and improved awareness of activity in space.

Major General Gregory J. Gagnon, Deputy Chief of Space Operations for Intelligence, said China's People's Liberation Army had rapidly advanced its space capabilities, putting American satellites at risk across every orbital regime. His warning covered the different regions of space in which satellites operate.

China and Its Academic Partners Respond

Chinese officials reject allegations that the observatories conceal military agendas. Senior Colonel Zhang Xiaogang, a spokesperson for China's Defense Ministry, said China supports the peaceful use of outer space and opposes its weaponization.

Zhang directed the criticism back at Washington. He said the United States treats space as a domain for war fighting and has militarized it through alliances. The two governments therefore present sharply different explanations for the dispute: Washington describes a security risk, while Beijing describes an attempt to restrict scientific development.

Christian Moni Bidin, the astronomer directing the Chilean side of the Ventarrones project, defended its academic purpose. He said the Catholic University of the North intended to use the site mainly for student training and educational exchanges. He also said the agreements explicitly rejected classified activities.

Moni Bidin acknowledged that the Chinese partners sought considerable autonomy. Their requests included restrictions on access to the land and ownership of all buildings, infrastructure and data. Those terms made questions of local control part of the dispute alongside the intended use of the telescopes.

The contrast is practical for Chilean researchers. A university may participate in a scientific partnership while having limited access to the facilities and information it produces. The proposed arrangements would determine how much the local institution could observe, teach and independently use the site.

Who Would Control Access and Observations?

The Ventarrones agreement reportedly allocates the Chilean university only one or two nights of observation each month. Typical international observatory partnerships give local institutions 10 percent of observation time. The proposal therefore drew attention to how much access Chile would receive in return for hosting the facility.

Chilean access could shrink further if Chinese scientists invoked the need for continuous monitoring. A program designed to watch the sky repeatedly may require instruments to follow a fixed schedule, limiting the time available for other research or student work.

Intelligence sources familiar with the negotiations suggested that special security fences might eventually separate portions of the site. One scientist described that prospect as a concession within the concession. The concern was that an already restricted project area could contain additional sections with even tighter access.

The ownership provisions, limits on entry and allocation of telescope time are concrete issues for Chile's review. They affect who can enter the site, who holds the observations and how the local university can take part in the work.

What Scientists Lose While Projects Wait

CART was designed to join arrays using very long baseline interferometry. This technique combines observations from radio telescopes separated by great distances, allowing them to work together like a much larger instrument and resolve finer detail than an individual telescope could see.

An Argentine station would strengthen coverage in the Southern Hemisphere, where such infrastructure is scarcer than in the north. Researchers hoped CART would contribute to studies of distant galaxies, cosmic radio phenomena and geodetic measurements, which concern the measurement of Earth.

The missing equipment prevents the telescope from making those contributions. Its absence also weakens the southern coverage that researchers expected from the wider network. International arrays depend on the locations of their participating instruments as well as the capabilities of each dish.

Astronomers say observatory projects require years of planning, stable institutional support and reliable data sharing. Sudden suspensions disrupt construction schedules, graduate training, the retention of technical teams and participation in international research networks.

Chile's planned educational exchanges and student training face similar uncertainty. For researchers in both countries, the dispute affects when instruments can become available and whether the partnerships built around them can continue as planned.

A Wider Contest for Influence in Latin America

China has more space infrastructure in Latin America than anywhere else outside its own territory. Argentina's Espacio Lejano Station was an early foothold. Other agreements have since extended cooperation beyond the two observatory projects now under scrutiny.

Brazil agreed in November 2024 to expand space cooperation and join China's Thousand Sails satellite constellation program. Panama signed a memorandum to participate in the International Lunar Research Station being developed by China and Russia.

Sitian project documents identify overseas observatories as parts of a global monitoring network. Documents reviewed by researchers list five initial international sites, with plans for expansion. A Mexican observatory is reportedly under consideration for future inclusion.

Western officials describe this expansion as an encirclement strategy. They argue that scientific and logistical facilities across the Western Hemisphere could give Beijing options for intelligence collection, communications relay and possible disruption.

Latin American governments also see investment and economic opportunity in Chinese partnerships. China has become the region's largest trading partner, buys roughly 40 percent of Chilean exports and controls substantial portions of national electrical grids. Those relationships complicate decisions about projects that attract American objections.

Francisco Urdinez, a professor at the Pontificia Universidad Catolica de Chile, described Chile's position as particularly vulnerable because it has free trade agreements with both Washington and Beijing. The country must manage relationships with both powers while deciding the terms under which foreign institutions can operate scientific infrastructure on its territory.

Argentina and Chile face immediate choices about customs clearance, regulatory approval, access and control. Scientists are waiting for those decisions to restore projects designed around the exceptional observing conditions of the Andes and Atacama Desert.

Key Points

• As of May 12, 2026, Argentina's approximately $32 million CART telescope remains unfinished, with key components held in customs.
• CART's 40 meter dish was designed to work across multiple frequency bands and join international radio telescope arrays.
• Chile suspended the approximately $80 million Ventarrones project, planned to contain about 100 telescopes, for regulatory review.
• US pressure continued across the Biden and Trump administrations, with concerns about satellite monitoring and military uses.
• China rejects the military allegations and accuses Washington of interfering with sovereign decisions and scientific cooperation.
• Ventarrones negotiations include questions about Chinese ownership, restricted access and only one or two observing nights each month for the Chilean university.
• The suspensions disrupt research planning, student training and international scientific networks.
• Neither project has a stated resolution date.