A new study suggests that some of the heaviest rocky planets ever reported may not be as heavy as they look. These so-called 'mega-Earths,' rocky planets weighing more than about 10 Earths, could be an illusion created by activity on their host stars. The paper was posted to the arXiv preprint ...

Source: [Phys.org](https://phys.org/news/2026-10-mega-earths-real-stellar-oversized.html)

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