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gj 523b mega earth exoplanet

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Latest related news (2026-08-20)

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  Astronomers discover a giant, rocky 'mega-Earth' 23 times more massive than our planet — Space
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  Researchers identify ‘Mega-Earth,’ prompting questions of how it formed — NewsNation
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  At 23.5 times Earth’s mass, GJ 523b is massive enough that standard planet-formation models struggle to explain why it didn’t accumulate a huge hydrogen-helium envelope — yet the planet is extraordinarily dense and apparently mostly rock, and astronomer — Space Daily