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There are 8 videos in this category and 3 videos in 2 subcategories.
Category Videos
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Not Right For WatchKnowLearn
Ages: 12 - 18
162 Views:
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To observe how winds move high in Earth's atmosphere, scientists sometimes release clouds of barium as tracers to track how the material corkscrews and sweeps around, but scientists have no similar technique to study the turbulent atmosphere of the s...un. So researchers were excited in December 2011, when Comet Lovejoy swept right through the sun's corona with its long tail streaming behind it. NASA's Solar Dynamics Observatory (SDO) captured images of the comet, showing how its long tail was buffeted by systems around the sun, offering scientists a unique way of observing movement as if they'd orchestrated the experiment themselves. Since comet tails have ionized gases, they are also affected by the sun's magnetic field, and can act as tracers of the complex magnetic system higher up in the atmosphere. Comets can also aid in the study of coronal mass ejections and the solar wind. (03:35)
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December 11, 2012 at 07:01 PM
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Not Right For WatchKnowLearn
Ages: 12 - 18
150 Views:
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Before 1979, there were less than a dozen known sun-grazing comets. As of December 2012, we know of 2,500. Why did this number increase? (02:37)
December 17, 2012 at 08:34 PM
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Not Right For WatchKnowLearn
Ages: 10 - 18
846 Views:
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Crystals of Creation or Comets: their beauties, their dangers, the places they came from, and their origins. It is believed that comets delivered the ingredients of life here on Earth. Half of the waters of our oceans are believed by some to have bee...n delivered by comets over the eons. (09:18)
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June 5, 2011 at 08:04 PM
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Not Right For WatchKnowLearn
Ages: 9 - 18
767 Views:
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Watch a space shuttle launched to discover the science of comets, what they're made of and how long they have been in the solar system. Amazing video clip from BBC.
July 20, 2011 at 06:36 PM
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Not Right For WatchKnowLearn
Ages: 12 - 18
68 Views:
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This is a short video following a scientist quest to document, and study a comets nucleus. This video explains where you can find the comets nucleus and how difficult it could be to document one. (2:21)
March 20, 2013 at 09:37 AM
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Not Right For WatchKnowLearn
Ages: 10 - 18
76 Views:
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This video clip provides a brief description on a recent comet sighting. Comet Pan-STARRS has survived its encounter with the sun and is now emerging from twilight in the sunset skies of the northern hemisphere. A NASA spacecraft monitoring the comet... has beamed back pictures of a wild and ragged tail. (3:08)
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March 20, 2013 at 09:25 AM
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Not Right For WatchKnowLearn
Ages: 10 - 18
929 Views:
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The once-in-a-lifetime expectation and approach, spectacular and beautiful show, and eternal farewell. The video footage is set to music Run time 03:44.
July 18, 2009 at 01:46 PM
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Not Right For WatchKnowLearn
Ages: 13 - 18
1076 Views:
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The Chandra X-Ray telescope is described along with the way it works. It offers ideas for how we can use the brightness of comets to make new discoveries.
July 29, 2009 at 05:23 PM
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