3I/ATLAS. A cat on my balcony
(En español aquí ) [Update, 10-Dec-2025: In the original version of this article, it was stated that the ATLAS telescope network observes more frequently the ecliptic than the rest of the sky. This statement is incorrect and has been removed from the text. ] S ummary Recently, a new interstellar object passing through our solar system has been discovered: 3I/ATLAS. This object has sparked much curiosity and is being intensely studied by astronomers worldwide. A paper uploaded to the arXiv preprint server suggests the possibility that this object might actually be an alien spacecraft secretly preparing to attack us at the end of this year. This peculiar idea is based on a series of coincidences supposedly too unlikely for a natural object. In this article, written for a general audience without requiring prior knowledge, I counter each of these alleged improbabilities. The first sections (Sections 1 and 2) present general reflections on the danger ...