File:Cosmic Background Radiation, Redshift and the Expanding Universe..webm
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Size of this JPG preview of this WEBM file: 800 × 450 pixels. Other resolutions: 320 × 180 pixels | 640 × 360 pixels | 1,024 × 576 pixels | 1,280 × 720 pixels | 1,920 × 1,080 pixels.
Original file (WebM audio/video file, VP8/Vorbis, length 30 s, 1,920 × 1,080 pixels, 2.19 Mbps overall, file size: 7.86 MB)
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English: At an earlier time, the universe was filled with hot opaque gas. As the universe grew colder with this expansion, the gas went from ionized atoms and electrons to neutral atoms and the gas became transparent. All the light that had been continually emitted, absorbed and scattered was now able to fly freely as if every point in the universe simultaneously emitted thermal radiation at the temperature of the gas. As the universe continued to expand, that radiation was continuously redshifted and we see it now as microwaves with an effective temperature of about 3 Kelvin. |
| Date | |
| Source | YouTube: Cosmic Background Radiation, Redshift and the Expanding Universe. – View/save archived versions on archive.org and archive.today |
| Author | Animations for Physics and Astronomy |
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This video, screenshot or audio excerpt was originally uploaded on YouTube under a CC license.
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Attribution: Animations for Physics and Astronomy
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This file, which was originally posted to
https://www.youtube.com/watch?v=s4S-W2KdHyc, was reviewed on 5 November 2018 by reviewer Gone Postal, who confirmed that it was available there under the stated license on that date.
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On 5 November 2018 the licence was CC-BY 3.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:11, 20 June 2018 | 30 s, 1,920 × 1,080 (7.86 MB) | Vislupus (talk | contribs) | Imported media from https://www.youtube.com/watch?v=s4S-W2KdHyc |
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