Six mysterious metal spheres that washed ashore last weekend at Forrest Beach in northern Queensland, Australia, are “suspected space debris,” the Australian Space Agency announced Monday, reports BritPanorama.
Informally dubbed “space balls,” the large objects are likely pressure vessels — heavy-duty containers of pressurized gases and liquids — from a rocket that reentered Earth’s atmosphere, according to the agency. The spheres were reported to be roughly twice the size of a basketball, according to local residents.
Although the space agency initially discouraged the public from approaching the spheres, Queensland emergency responders have since removed the objects and determined them to be safe, the ASA confirmed. Agency officials say further debris may be found.
“Never touch, move or recover suspected space debris and assume it to be hazardous until advised otherwise. Move away and contact emergency services,” wrote an ASA spokesperson in an email.
The agency is currently working with international authorities to determine which vehicle the space balls originated from and which nation conducted the launch.
The problem of space junk
Space junk can take various forms, including dead satellites, empty fuel tanks, or microscopic paint flecks. With the rise of space innovation and exploration in recent decades, researchers have been studying spacecraft motion to mitigate potential collisions and hazards on Earth.
Nonetheless, debris has become an increasing issue. From 2013 to 2024, the amount of space debris the military was tracking increased by more than 104%, from 23,000 pieces to 47,000, according to reports from the United States Space Force. As most objects are believed to be too small to track, ranging from 1 millimeter to 10 centimeters, NASA estimates that millions of debris pieces are in low Earth orbit.
While it isn’t common for space junk to fall to Earth, incidents do occur occasionally. In March 2025, a NASA spacecraft reentered Earth’s atmosphere, but it was expected that most or all of the probe burned up in the process.
In recent years, space debris incidents have raised alarm. In 2023, a mysterious 10-foot cylinder washed ashore at Green Head, a coastal town north of Perth, Australia. Additionally, in 2024, debris from the International Space Station struck a Florida home, which was unexpected since it was believed the materials would burn up upon reentry.
No documented deaths have occurred due to space debris; however, there have been reports of injuries. John Crassidis, a professor of mechanical and aerospace engineering at the University at Buffalo, noted one incident in 2002 when a 6-year-old boy in China’s Shaanxi Province was hit by a rocket fragment. A few years prior, Lottie Williams was struck by a piece of space debris in Oklahoma, becoming the first person known to have been hit, according to Guinness World Records.
Experts emphasize that mitigating these risks requires preparation to prevent collisions between satellites and other spacecraft. “One of the things that aerospace has done over time is looked at some of these reentered objects to try to understand what conditions are. How do we improve our models?” stated Marlon Sorge, executive director of The Aerospace Corporation’s Center for Orbital and Reentry Debris Studies.
In recent years, space technology companies have made efforts to control the problem. SpaceX, for example, has developed reusable rockets, while Astroscale is creating a robotic space arm that can catch dead satellites. “There’s much more awareness of this whole reentry risk problem,” Sorge remarked, adding that operators are designing their satellites intentionally to minimize the survival of hazardous debris.
“We need to make sure that we implement guidelines and mitigation approaches to prevent this stuff from becoming a problem,” Sorge concluded, highlighting the urgency of addressing the growing concerns surrounding space debris.
As awareness grows about the risks posed by space debris, the dialogue among experts, operators, and space agencies will be crucial to shaping safer practices for future launches, maintaining the balance between innovation and safety.
