计算机模拟表明，要演变成我们目前的太阳系，最初的形式可能存在第五个巨大的气体行星。
To evolve into our current solar system, the original version probably had a fifth gas giant, computer simulations indicate.
我们关于过去30年的雪和海冰变化的分析表明，该冰冻圈反馈强度几乎是模式模拟的两倍。
"Our analysis of snow and sea ice changes over the last 30 years indicates that this cryospheric feedback is almost twice as strong as what models have simulated," Flanner said in a press release.
9月23日发布的美国国家航空航天局超级计算机模拟图像表明，对于一个外星人，如果在现在和几百万年前用红外技术观察我们的太阳系，都会看到什么景像。
NASA supercomputer simulations released September 23 suggest what our solar system may look like to an alien using infrared technology now—and millions of years ago.
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