3I/ATLAS alien ship engine in overdrive? Harvard scientist claims interstellar comet is driven by ‘non-gravitational’ acceleration; here’s what he said after the comet reached closest to the sun

Harvard astrophysicist Avi Loeb suggests the interstellar comet 3I/ATLAS’s unusual blue color and non-gravitational acceleration could point to an internal engine, possibly alien technology. He highlights this as the ninth anomaly for the comet, which was discovered in July 2025. Loeb said that 3I/ATLAS displayed the first evidence of a non-gravitational acceleration by the date of its perihelion.