The interstellar object 3I/ATLAS is expected to approach the Sun around October 29 and 30.
It will pass the Sun at a distance of roughly 1.4 au, barely inside Mars' orbit.
Comet 3I/ATLAS is now the most discussed interstellar object among astronomers.
Astronomers are studying its size and physical properties.
Author summary: Comet 3I/ATLAS approaches Sun soon.