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This blue, marble-like planet is very similar to Earth. But just five seconds on this hostile sphere would be enough to kill you. Welcome to HD 189733b. This planet is gigantic, even larger than Jupiter. And to continue the comparison with the largest planet in the Solar System, it is also completely composed of gases. What If in other places: What If in English: http://bit.ly/facebook-whatif What If in Spanish: http://bit.ly/YT-Spanish-what-if What If in Italian: http://bit.ly/Cosa-succederebbe-se What If in French: http://bit.ly/Et-si-youtube What If in Mandarin: http://bit.ly/YT-Chinese-what-if What If in Hindi: http://bit.ly/what-if-hindi-youtube Podcast: http://bit.ly/yt-what-if-show-podcast What If is a documentary miniseries that takes you on an epic journey of hypothetical worlds and possibilities. Come with us on an imaginary adventure through time, space and chance. We'll do our best to explain complex topics in a fun way. Produced with love by Underknown in Toronto: https://underknown.com