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- 曼聯的FDLv 61 十年前最愛解答
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In 1953, the Miller–Urey experimentdemonstrated that a combination of lightning and the chemical compounds that existed in the atmosphere of a primordial Earth could form organic compounds (including amino acids) that could serve as the building blocks of life. The simulated atmosphere included water, methane, ammonia and molecular hydrogen; all molecules still found in the atmosphere of Jupiter. However, the atmosphere of Jupiter has a strong vertical air circulation, which would carry these compounds down into the lower regions. The higher temperatures within the interior of the atmosphere breaks down these chemicals, which would hinder the formation of Earth-like life.[119]It is considered highly unlikely that there is any Earth-like lifeon Jupiter, as there is only a small amount of water in the atmosphere and any possible solid surface deep within Jupiter would be under extraordinary pressures. However, in 1976, before the Voyagermissions, it was hypothesized that ammonia or water-based life could evolve in Jupiter's upper atmosphere. This hypothesis is based on the ecology of terrestrial seas which have simple photosyntheticplanktonat the top level, fishat lower levels feeding on these creatures, and marine predatorswhich hunt the fish.The possible presence of underground oceans on some of Jupiter's moons has led to speculation that the presence of life is more likely there.
Jupiter is the fifth planetfrom the Sunand the largestplanet within the Solar System.[13] It is a gas giantwith a massslightly less than one-thousandth of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn, Uranusand Neptune. Together, these four planets are sometimes referred to as the Jovianplanets.
