Not your everyday beach balls: Six mysterious 'space balls' wash up on Australian shore

Australian authorities are investigating the origins of six mysterious spheres that washed up on a beach in northern Queensland over the weekend. Dubbed "space balls," the objects were discovered on Forrest Beach, north of Townsville, and are believed to be space debris, though the Australian Space Agency (ASA) has yet to confirm their origin.

Following their discovery, Queensland's Fire Department established a 50-meter protective area and cautioned the public against touching suspicious objects. Online speculation has suggested the space balls could be propellant tanks for spacecraft, potentially containing flammable or toxic substances. Some have debated a possible connection to NASA's ongoing mission to intercept a falling telescope, but the agency has not claimed any involvement.

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This suggests they might be from a rocket stage - perhaps a first or second stage - that has fallen back to Earth while the rest of the stage goes on to deliver a payload into space

Space archaeologist and space-junk expert Associate Professor Alice Gorman told The Guardian that the balls show no signs of scorching, indicating they likely never left the atmosphere. "This suggests they might be from a rocket stage - perhaps a first or second stage - that has fallen back to Earth while the rest of the stage goes on to deliver a payload into space," she explained. Gorman added that they appear consistent with pressurized fuel vessels made of titanium alloys, which have high melting points.

She further noted that such "space balls" can be found years after a launch, suggesting they might not be related to any recent incidents. Currently, the ASA and the fire department are working to ensure the balls can be handled safely, as it remains unclear if they contain hazardous materials like hydrazine, a toxic rocket fuel.

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They look to be consistent with what you find as part of a fuel system. They are pressurized fuel vessels made of titanium alloys, which have very high melting points.