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USA HERALD - The Manhattan-sized interstellar visitor 3I/ATLAS has transitioned from displaying an unusual anti-tail to exhibiting a conventional cometary tail, a shift that Harvard astrophysicist Avi Loeb argues could indicate controlled maneuvering by an alien spacecraft.

New images captured by Spain's Nordic Optical Telescope in September show material streaming behind the 33-billion-ton object as it approaches the sun and absorbs up to 33 gigawatts of solar radiation.

The International Asteroid Warning Network added 3I/ATLAS to its monitoring list this week, describing it as presenting "a great opportunity" for observation due to its prolonged visibility and high scientific interest, while emphasizing the object poses no threat to Earth.

The interstellar object first appeared in our solar system in July and later began exhibiting what scientists identified as an anti-tail, an uncommon plume directed toward the sun rather than away from it.

According to Loeb's recent paper, this anti-tail consisted primarily of carbon dioxide and water vapor, but also contained trace amounts of cyanide and a nickel alloy that has never been observed in nature and exists only in human manufacturing processes. The presence of this synthetic material has become a focal point in discussions about the object's possible artificial origin.

Loeb has proposed that if 3I/ATLAS is indeed an alien spacecraft executing a deceleration maneuver, the anti-tail would represent evidence of braking thrust as the craft slowed its approach.

The subsequent appearance of a traditional tail, he suggests, would naturally follow as the braking procedure concluded and the object continued its trajectory under different conditions. This succession from anti-tail to tail, Loeb contends, fits the profile of controlled maneuvering rather than the typical behavior of a natural comet or asteroid.

The astrophysicist has characterized the scenario as a potential high-impact Black Swan event, referring to the concept of a rare, unpredictable occurrence with massive consequences.

While most astronomers remain cautious about attributing artificial origins to celestial objects, the unusual composition of 3I/ATLAS's anti-tail and its behavioral patterns have made Loeb's predictions increasingly difficult to dismiss outright.

The scientific community is currently awaiting the release of images captured by NASA's HiRISE camera aboard the Mars orbiter when 3I/ATLAS passed within 12 million miles of the Red Planet earlier this month.

These images would represent the highest resolution views of the object obtained to date and could provide crucial evidence to either support or refute theories about its nature. However, the ongoing federal government shutdown has delayed the space agency's release of this data, leaving researchers around the world in suspense.