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Astronomers have for the first time discovered water in the atmosphere of a planet orbiting within the habitable zone of a distant star.
The finding makes the world – which is called K2-18b – a plausible candidate in the search for alien life.
Within 10 years, new space telescopes might be able to determine whether K2-18b’s atmosphere contains gases that could be produced by living organisms.
Details were published in the scientific journal Nature Astronomy.
The lead scientist, Prof Giovanna Tinetti of University College London (UCL) described the discovery as “mind blowing”.
“This is the first time that we have detected water on a planet in the habitable zone around a star where the temperature is potentially compatible with the presence of life,” she said.
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Waterworld: up to 50% of the atmosphere of K2-18b may be composed of water
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