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Extrasolar planet HD 189733b
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- Title Extrasolar planet HD 189733b
- Released 20/03/2008 10:10 am
- Copyright ESA/ NASA/ UCL (G. Tinetti)
Artist’s impression of the extrasolar planet HD 189733b, now known to have methane and water. Astronomers used the Hubble Space Telescope to detect methane — the first organic molecule found on an extrasolar planet. Hubble also confirmed the presence of water vapour in the Jupiter-size planet’s atmosphere, a discovery made in 2007 with the help of the Spitzer Space Telescope. They made the finding by studying how light from the host star filters through the planet’s atmosphere.