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\nNASA | Using Quasars to Measure the Earth: A Brief History of VLBI - 3D\n

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\n\nPublisher:\n\nNASA\n\n\n
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\nVLBI, or Very Long Baseline Interferometry, is a technique that uses multiple radio telescopes to very precisely measure the Earth's orientation. It was originally invented back in the 1960s to take better pictures of quasars, but...\nVLBI, or Very Long Baseline Interferometry, is a technique that uses multiple radio telescopes to very precisely measure the Earth's orientation. It was originally invented back in the 1960s to take better pictures of quasars, but scientists soon found out that if you threw the process in reverse, you could measure how the ground beneath the telescopes moves around, how long days really are, and how the Earth wobbles on its axis as it revolves around the sun! Learn more about VLBI here!

This video is presented in both stereoscopic 3D and standard 2D versions.


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Resource Details

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Educator Rating
Not yet Rated
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Media Length
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1:51
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Grade
3rd - 11th
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Subjects
Science
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Media Type
Instructional Videos
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Source:
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\nNASA Goddard\n\n
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Date
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2012
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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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nasa, time, telescopes, scientists
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Additional Tags

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goddard, chris, smith, 3d, vlbi, quasars, earth, wobbles, quasar, ground, moves, 24 hours, find, axis, move, figure, point
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