A Harvard University professor has said that 3I/ATLAS experienced a sudden "nongravitational" acceleration while passing around the sun.

As 3I/Atlas neared its closest point to the sun in its orbit, the internet was abuzz with curiosity about the comet.

According to the study, interstellar object 3I/ATLAS showcased its first sign of a non-gravitational acceleration at perihelion, or the point of closest approach to the Sun. The non-gravitational acceleration was detected at a perihelion distance of 1.36 times the Earth-Sun separation, equivalent to 203 million kilometers.

Here's where Comet 3I/ATLAS, Lemmon and SWAN are in the Halloween sky.

While experts like Avi Loeb have raised intriguing possibilities, NASA confirms the definitive news: 3I/ATLAS poses 'no threat' to Earth.

Astronomer Avi Loeb outlines nine "anomalies" that he says support his hypothesis that interstellar object 3I/ATLAS is an alien artefact.

Astronomers have identified Comet 3I/ATLAS as an interstellar object, making it only the third confirmed visitor from outside our solar system, according to NASA.<br /><br />The comet is travelling on a hyperbolic trajectory,

Harvard astrophysicist Avi Loeb is fiercely demanding that NASA release high-resolution images of the interstellar object 3I/ATLAS.