Interstellar Visitors: Searching for Alien Technology ⚡ экспресс
With the discovery of the third confirmed interstellar object, 3I/ATLAS, a new phase of studying these long-awaited bodies has begun. Their role as targets in the search for technosignatures (historically SETI) has been discussed for decades. With the Vera C. Rubin Observatory and the LSST survey coming online, detecting and tracking interstellar objects will become routine, necessitating a systematic approach to searching for possible technosignatures. A literature review is presented, providing motivation for such research. Four broad classes of technosignatures suitable for accompanying interstellar objects are identified, including required data types and optimal observation times. It is noted that due to our limited knowledge of these objects, caution is needed when identifying technosignatures, relying mainly on comparison with Solar System bodies. A roadmap is proposed for a careful and sequential study of the interstellar object population aimed at detecting technosignatures.
In 2017, astronomers spotted a strange object that came from another star. ‘Oumuamua—the first interstellar guest—sped up as it moved away from the Sun, as if it had an engine. Ordinary lumps of ice and rock don’t behave that way.
The new Vera Rubin Telescope will discover tens of thousands of such visitors. To figure out if they might be someone’s probes, scientists will study their ‘manners’: how their brightness changes (photometry) and what trace their light leaves in a rainbow strip—spectroscopy will reveal their chemical makeup. But there’s a risk of mistaking the alien for the artificial: we have no idea what a typical interstellar boulder looks like. An anomaly by Solar System standards could be the norm in other corners of the Galaxy.
So we’ll scrutinize these visitors following a strict protocol—like customs officers with a detector. And if even one artificial artifact turns up among thousands, humanity will forever stop feeling alone.
🎯 The first interstellar guest, ‘Oumuamua, didn’t slow down as it left the Sun—it sped up, like a motorboat. That raised suspicions it might have been artificial.
🎬 In ‘Rendezvous with Rama,’ Arthur C. Clarke described the arrival of a mysterious cylinder that turned out to be an alien spaceship—a story that echoes our interstellar visitors.