The temperature at Earth's exobase oscillates but is typically about 1,000 kelvins, implying that hydrogen atoms have an average speed of five kilometers per second.
地球外气层底
温度是
断变
,
过通常约是1000K,使得氢原子平均
速度为每秒5公里。
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In 2016, scientists used lasers to squeeze atoms, reaching a low temperature of 360 millionths of a kelvin — that's almost imperceptibly above absolute zero and even lower than physicists once thought was possible.
2016 年, 科学家们使用激光挤压原子,达到了 3.6 亿分之一
尔文的低温——这几乎难以察觉地高于绝对零度, 甚至低于物理学家曾经认为可能的水平。
Who knows what they made of the heat, but the physicist Lord Kelvin — of temperature fame, naturally — had a theory: Earth started off hot, and has been cooling down ever since, like a baked potato pulled from the oven.
谁也不知道地球的热量是怎么来的,但是以热力学而著名的物理学家 Kelvin 有一个理论:地球最
始是炎热的,然后逐渐冷却了下来,就像一个烤土豆放进烤箱。
Darwin's Theory of Evolution strongly implied the Earth was at least millions of years old, and Lord Kelvin, a hugely respected physicist and engineer, confirmed the Earth was ancient, given that it must have cooled from an initially molten state.
达尔文的进化论强烈暗示地球至少有几百万年的历史,而凯尔文勋爵,一位广受尊敬的物理学家和工程师,也证实了地球是古老的,因为它一定是从最初的熔融状态冷却下来的。