Alien spy? Mystery space object may be nuclear spaceship, claims Harvard scientist

A recently discovered interstellar comet, 3I/ATLAS, detected in July 2025, has attracted significant scientific attention due to its rare origin outside our solar system. It is only the third known interstellar object after 1I/ʻOumuamua and 2I/Borisov. Harvard scientist Avi Loeb has speculated that 3I/ATLAS might not be a natural comet but potentially a nuclear-powered spacecraft of extraterrestrial origin. Loeb bases this hypothesis on observations from the Hubble Space Telescope showing a light glow seemingly emanating from the object's core rather than from surrounding dust, as is typical for comets. He proposes two explanations: either it is a radioactive fragment from a supernova or, more speculatively, a spacecraft emitting dust from its surface as it travels through space. Loeb acknowledges that these claims are bold and require more evidence to be substantiated. He highlights the object's unusual "fine-tuned trajectory" and its similarity in size to