On December 10, 2008 (November 13, 2008 in the lunar calendar), NASA's Hubble Telescope discovered that the atmosphere of an extrasolar planet contains carbon dioxide. On December 10, 2008, NASA's Hubble Telescope discovered that the atmosphere of an extrasolar planet contains carbon dioxide. NASA observed the presence of carbon dioxide in the atmosphere of a hot planet outside the solar system through the Hubble Telescope. This is the first time astronomers have found carbon dioxide in the atmosphere of an extrasolar planet. Since carbon dioxide is one of the four chemical elements produced by life on Earth, if the presence of carbon dioxide is detected in distant outer space, astronomers will be able to search for signs of life on other planets. The extrasolar planet, called HD 189733b, is the size of Jupiter. It is about 63 light-years away from Earth and has a surface temperature of up to 1,000 degrees Celsius, making it unsuitable for life. However, the Hubble Space Telescope has observed carbon dioxide, water gas and methane in the atmosphere of HD 189733b, which has encouraged astronomers because carbon dioxide is an important material for organic life and may lead to breakthroughs in the search for distant Earth-like planets. Bowes, a planetary composition theorist at the Carnegie Institution in Washington, said: "This is the first time that humans have detected the presence of carbon dioxide in the atmosphere of an extrasolar planet, which also means that three of the four hallmarks of a cosmic world suitable for life or existing life have now been found: water, methane and this discovery of carbon dioxide. Now there is only one other key element that has not been found in outer space, and that is oxygen or ozone. "Comments: Exploring the mysteries of the universe is the desire of every earthling