When I heard the news that an interstellar object had been spotted hurtling into our Solar System, my thoughts were: 1) Okay. Surely that's not a rare thing, is it? 2) Uh... is it an alien? Turns out that while there probably ARE a tonne of objects winging their way through our Solar System from 'elsewhere', it is rare indeed to spot them: this is only the third interstellar object we've ever seen (hence the name, 3I/ATLAS, with ATLAS being the telescope project that spotted it). And no, it's not an alien spacecraft, although there was a moment of speculation about instellar object number one, back in 2017, that the weird cigar-shaped strangely-accelerating object was alien. It wasn't. It was great fun to chat with the people involved with the find. Check my story at Nature : https://www.nature.com/articles/d41586-025-02141-5 PS - perhaps one day there will be something out there, somewhere, that notices Voyager 1 or 2 passing by, and yes indeed we will be the...