India, Nov. 20 -- Scientists from Physical Research Laboratory (PRL), Ahmedabad, observed the interstellar comet 3I/ATLAS currently on its way out of the inner solar system after the perihelion (closest to the Sun) passage, Isro said on Wednesday. According to Nasa, comet 3I/ATLAS is the third known object from outside our solar system to be discovered passing through our celestial neighbourhood. Astronomers have categorised this object as interstellar because it does not follow a closed orbital path about the Sun. When the orbit of 3I/ATLAS is traced into the past, the comet clearly originates from outside our solar system, Nasa said. htc
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