US Monitors China's Space Activities Amid Orbital Debris Concerns

The commander of American military space operations delivered a stark assessment on Friday: the United States is watching China's expanding presence in orbit with deepening concern, even as debris accumulates at an alarming rate in the region of space where most satellites operate.

Army General James Dickinson, who leads U.S. Space Command, spoke by phone from Asia about the mounting hazard posed by objects floating in low Earth orbit—the zone roughly 500 to 1,200 miles above the surface where communications satellites, weather instruments, and space stations depend on clear passages. Space Command is now tracking more than 48,000 pieces of debris in near-Earth orbit, nearly double the 25,000 objects catalogued just three years earlier. These fragments range from defunct satellites to spent rocket stages to shards of metal no larger than a marble, yet each one travels at speeds that can shatter whatever it strikes. The accumulation has transformed the region into what Dickinson called a domain that is "congested, competitive and contested."

Much of this debris traces back to a single Chinese action. In 2007, China conducted a test that drew international condemnation: it launched a missile that destroyed one of its own defunct satellites, creating a cloud of wreckage that persists in orbit today. The test demonstrated China's capacity to strike objects in space—a capability known as an antisatellite weapon—but it also illustrated the lasting consequences of such demonstrations. The debris field continues to threaten active satellites and the International Space Station. Four countries have now conducted direct-ascent antisatellite tests. The United States voted in favor of a recent United Nations resolution calling for countries to stop conducting such tests; China and Russia voted against it, while India abstained.

China's space program has grown substantially since it first launched an astronaut into orbit in 2003, becoming the third nation to achieve that milestone after the Soviet Union and the United States. The program operates under the control of the People's Liberation Army, the military wing of the Communist Party, a structure that has kept it largely isolated from international cooperation. NASA cannot work with the Chinese program, and China is barred from participating in the International Space Station. Instead, Beijing has built its own orbital station, which recently completed its three-module configuration and briefly hosted six astronauts during a crew rotation. China has also deployed rovers to the moon and Mars and is preparing for a crewed lunar mission.

Dickinson framed China's space ambitions as inseparable from its broader strategic posture. Beijing views space as essential not only to economic competition but to military advantage, he said. The secretive nature of the Chinese program, combined with its rapid advancement, means the United States must maintain constant vigilance. "China continues to build capabilities that, really quite frankly, hold most of our assets at risk in the space domain," Dickinson said. The concern extends beyond debris. The Pentagon released a security report the week before Dickinson's remarks warning that China is likely to possess approximately 1,500 nuclear warheads by 2035, with no public explanation of how Beijing intends to employ them.

Space has become a focal point in the broader deterioration of U.S.-China relations. Tensions already run high over Taiwan, the South China Sea, trade disputes, and technology competition. Russia's invasion of Ukraine has underscored how space can become a contested battlefield, with both sides targeting satellites and communications infrastructure. Dickinson emphasized that protecting American space assets is now a core mission for U.S. Space Command, one that requires the unified commitment of allied nations. "The unified stance of our allies and partners is critical in countering the coercion and subversion that threatens the international rules-based order here in the Indo-Pacific and beyond," he said. As China expands its capabilities and debris continues to accumulate, space has shifted from a domain of scientific exploration to one of strategic competition—and potential conflict.