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Light Seconds, Light Years, Light Centuries: How To Measure Extreme Distances - Yuan-Sen Ting

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 Astronomy   |   Physics   |   Science
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View full lesson: http://ed.ted.com/lessons/how-do-we-measure-distances-in-space-yuan-sen-ting

When we look at the sky, we have a flat, two-dimensional view. So how do astronomers figure the distances of stars and galaxies from Earth? Yuan-Sen Ting shows us how trigonometric parallaxes, standard candles and more help us determine the distance of objects several billion light years away from Earth.

Lesson by Yuan-Sen Ting, animation by TED-Ed.

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