Threshold 2: Stars Light Up발음듣기
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Threshold 2: Stars Light Up
24문장
100% 한국어
번역 9명 참여
출처 : 칸아카데미
번역
0%
(light music) Right off to the big bang our young universe was what scientist called a plasma.발음듣기
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This was basically an incredibly hot mush of charged particles with that much structural or complexity.발음듣기
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By then, temperatures had fallen low enough for protons, which are positive charges, to link up with electrons, which are negative charges, and together they formed electrically neutral atoms.발음듣기
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Pretty simple ones like hydrogen, some helium, and a few slightly heavier atoms thrown in for good measure.발음듣기
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The universe now contained fast clouds of these atoms and gravity and now you have the ingredients for our second threshold.발음듣기
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Tiny variations in the density of matter became the first Goldilocks condition for this second threshold.발음듣기
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Gravity packed slightly against the regions and a little closer together squashing them so tightly that they began to heat up.발음듣기
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Eventually, the clouds got so hot the protons and electrons split apart once more recreating a plasma.발음듣기
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When temperatures in these hot spots got to about 10 million degrees Celsius, protons began to fuse together.발음듣기
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This huge release of heat, from the center of each cloud of matter, stopped the cloud from collapsing any further.발음듣기
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Each star would continue to release energy into space for millions or even billion of years until it had no more protons to fuse.발음듣기
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