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\nThe Cosmic Dark Ages\n

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\n\nPublisher:\n\nPBS\n\n\n
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\nIn astronomy we study things that are very far away. It’s a powerful challenge because even the brightest objects are almost impossibly faint when you view them from the other side of the universe. But there’s an up side. If the light...\nIn astronomy we study things that are very far away. It’s a powerful challenge because even the brightest objects are almost impossibly faint when you view them from the other side of the universe. But there’s an up side. If the light from some space object took billions of years to get to us then we see that object as it was billions of years ago. In this way we can peer back in time and literally see the past in motion. In fact we’re able to see some of the first stars and galaxies to ever form. But if we look beyond, both in distance and in time, there is … nothing. Darkness. For the hundred million years or so between the formation of the first atom and the formation of the first star there were no light sources in the universe. These were the cosmic dark ages. It’s a period of cosmic history rarely discussed because it’s hellishly difficult to observe. Fortunately scientists are devilishly clever. So what do we know about the time before stars?\n
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Resource Details

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Curator Rating
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Educator Rating
Not yet Rated
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Media Length
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12:29
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Grade
12th - Higher Ed
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Subjects
Science
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Media Type
Instructional Videos
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Source:
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\nPBS Space Time\n\n
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Date
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2019
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Language
English
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Audiences
For Teacher Use
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Usage Permissions
Fine Print: Educational Use
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Concepts

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space, quantum mechanics, time, hydrogen, wavelength, galaxies, elements, light, absorption, stars, electrons, outer space, astrobiology, black holes, the universe, science fiction
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Additional Tags

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physics, astrophysics, space physics, pbs, space time, pbs space time, matt o’dowd, einstein, einsteinian physics, general relativity, special relativity, dark energy, dark matter, math, calculus, maths, reality, consciousness, dark ages, history of universe, big bang, surrounding gas, lyman alpha, neutral hydrogen, fully ionized, danger zone, stars formed, light absorbed, ionized, formed, back, danger, absorbed, recombination, filled, expanded, reionization, universe, photon, left
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Classroom Considerations

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Video is ad-free
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