File:HistoryOfUniverse-BICEP2-20140317.png
![File:HistoryOfUniverse-BICEP2-20140317.png](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/HistoryOfUniverse-BICEP2-20140317.png/776px-HistoryOfUniverse-BICEP2-20140317.png?20140318163342)
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说明
说明
摘要
[编辑]描述HistoryOfUniverse-BICEP2-20140317.png |
English: History of the Universe
http://bicepkeck.org/visuals.html The bottom part of this illustration shows the scale of the universe versus time. Specific events are shown such as the formation of neutral Hydrogen at 380 000 years after the big bang. Prior to this time, the constant interaction between matter (electrons) and light (photons) made the universe opaque. After this time, the photons we now call the CMB started streaming freely. The fluctuations (differences from place to place) in the matter distribution left their imprint on the CMB photons. The density waves appear as temperature and "E-mode" polarization. The gravitational waves leave a characteristic signature in the CMB polarization: the "B-modes". Both density and gravitational waves come from quantum fluctuations which have been magnified by inflation to be present at the time when the CMB photons were emitted. National Science Foundation (NASA, JPL, Keck Foundation, Moore Foundation, related) - Funded BICEP2 Program http://bicepkeck.org/faq.html |
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来源 | http://bicepkeck.org/media/History-of-the-Universe-BICEP2.jpg | |||||
作者 | National Science Foundation | |||||
其他版本 |
English: multilingual Oʻzbekcha / ўзбекча: ko‘p tilli fayl Қазақша: көптілді файл Русский: многоязычный файл
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许可协议
[编辑]Public domainPublic domainfalsefalse |
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注意︰本模板仅适用于美国联邦政府的原创作品,不适用于任何美国州、属地、联邦个体、县、市或任何次级政府的作品。本模板也不适用于1978年以后由美国邮政署出版的邮票图案(参看美国版权局实践纲领第313.6(C)(1)条)。也不适用于部分美国硬币;参看美国铸币局使用条款。 |
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本文件已被确认为免除已知的著作权法限制(包括所有相关权利)。 |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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- File:HistoryOfUniverse-BICEP2-20140317.png
- File:History of the Universe-ar.svg
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- File:History of the Universe-zh-hans.png
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- File:History of the Universe-zh-hant.png
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- File:History of the Universe-zh-hant (2).svg
- File:History of the Universe-zh-hant Inkscape.png
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- File:History of the Universe-zh-hant librsvg.png
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- File:History of the Universe.svg
- File:History of the Universe (multilingual).svg
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- File:History of the Universe fr crop.xcf
- File:History of the Universe fr test.svg
- File:History of the Universe mk.svg
- Template:Other versions/History of the Universe
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