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How I discovered an Exoplanet & the science apocalypse

> TL;DR: I discovered (a few) exoplanet candidates, I walk through how. Then I talk about the near future of science given the ease of and growing capabilities of agentic systems. These are largely independent sections, you can skip ahead. > LLM Usage: All text was generated by a Human Language Model, the discovery itself was done mostly by Claude Opus 5.5. The widgets are all Claudeslop code but they really do help with the explanation so please bear with them. Exoplanet The Transiting Exoplanet Survey Satellite (TESS) was built for detecting exoplanets. Each month (27 days) TESS focuses on a different patch of the sky, and every 200 seconds its wide field-of-view cameras repeat their observations of that particular patch of the celestial sphere. In 2023 NASA estimated that TESS has photographed over 93% of the night sky at least once. TESS's observational sectors, from NASA's "How to find an Exoplanet with TESS data" In one of these sectors (55 to be exact[1]), there's a star elegantly named TIC 423560969. Given that TESS is made to scan large swaths of the night sky very quickly, the resolution isn't too great, yet as you'll see there's still a pretty clear signal that can be extracted. We can make a time-lapse of the month during which the star was recorded by TESS. It's not particularly illuminating. There's a lot of noise and being 2,300 light-years away doesn't help. It's not perceptible when a transit (partial eclipse) is happening. TESS actually scanned this star twice: Once in August 2022 and once in May 2025. By looking at when the star's brightness dips (or more precisely, at the period of the dips) we can get the exoplanet's orbital period. We can then test this on the other month of observations by TESS and double-check that the transit really does occur with that periodicity. There are a few steps to cleanly extract the transit's effect on the star's brightness, removing the sky's (changing w.r.t time) background glow, de-noising etc.

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SIGNAL FROM THE SOURCE
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Tracking sinceOctober 20, 202611 source points
Momentum—More observations needed
PublishedOctober 20, 2026jonathanbreitg
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