The hunt for exoplanets is like catching shadows: an invisible planet gives itself away only by a microscopic dimming of starlight. The space telescope TESS caught such a dip for star TOI 864 — it lasted half a day and its strength hinted at a rocky world the size of Earth, spinning almost in the embrace of its sun. But astronomers don't take even perfect shadows at face value.
A super-sharp ground-based image exposed the counterfeit: next to TOI 864 hid a second star, invisible to ordinary telescopes. Their dance — periodic eclipses — created the illusion of a planet transit. The blended light of the two suns smoothed out the dip, fitting the picture into a planetary template. The forgery was revealed when precise brightness measurements showed mismatches in time and depth. It turns out that every third exoplanet candidate from space surveys is just such a fake. But here's the paradox: each unmasked double doesn't disappoint hunters but rather sharpens their tools, bringing us closer to the discovery of real worlds.
🎯 Every third planet candidate from space surveys turns out to be an illusion, but paradoxically: it is these fakes that perfect the technology for discovering real worlds.
🎬 The situation resembles the search for the planet Vulcan, which was vainly sought between Mercury and the Sun — it was also an illusion, dispelled by the theory of relativity.