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An artists impression of the extrasolar planet HD 189733b seen here with its parent star. The planet is 15% larger than our own Solar System’s Jupiter and its atmosphere is a scorching 800 degrees Celsius (1,472 degrees Fahrenheit). Winds of over 5,000 mph are believed to be responsible for dissipating the heat which could explain why it hasn't simply boiled away. I have adapted and extended the original image in photoshop to make it more complete and polished off.

Image Credit: European Space Agency.