Recent images of the interstellar object 3I/ATLAS, captured by the powerful Gemini South telescope at the NOIRLab observatory, reveal that the comet has begun to form a tail. This development was reported by ScienceAlert.
Researchers attribute the formation of the tail to the active sublimation of ice within the comet as it approaches the Sun. 3I/ATLAS is particularly noteworthy because its activity commenced beyond Jupiter`s orbit, an unusual characteristic for most comets. This early activity is due to its high carbon dioxide content, whose ice sublimates at much lower temperatures than water ice.
Scientists anticipate that by its closest approach to the Sun on October 29, 2025, the comet`s tail will become even longer and brighter. This will facilitate a more detailed study of its composition, as spectral data already suggest an unusual chemical makeup for the object.
3I/ATLAS is only the third interstellar object ever observed in our solar system, following asteroid Oumuamua and Comet Borisov. Its trajectory poses no threat to Earth, as its closest approach will occur beyond Mars`s orbit, well after it passes its perihelion (the point of closest approach to the Sun). Astronomers have ample time to further investigate this enigmatic visitor from the depths of the galaxy.
It is worth noting that earlier rumors suggesting the interstellar comet 3I/ATLAS might be an alien spacecraft have been debunked by experts.
