A Study Shows That “Water Worlds” Could Be As Common As Earths

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“Water Worlds” are a recently discovered type of exoplanet where water contributes to 50% of the planet’s mass. For comparison, the Earth’s water only contributes 0.02% to our planet’s mass. A research team discovered these Water Worlds after an analysis of exoplanets revealed discrepancies between their size and their density; they were too light for how big they were. A significant number of the exoplanets they analysed—which all revolved around the universe’s most common type of star, M stars—were Water Worlds, suggesting they could be as common as Earth-like planets. Read full article here

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