What light can teach us about the universe - Pete Edwards
View full lesson: http://ed.ted.com/lessons/what-light-can-teach-us-about-the-universe-pete-edwards Humanity has long been looking at the universe and asking ...
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How and when did our universe begin? How did it get to look like this? How will it end? Humans have been discussing these questions for as long as they've been around without ever reaching much agreement. Today, cosmologists are working hard to find the answers. But how can anyone hope to find concrete answers to such profound questions? And how is it possible to explore and study something as huge as the universe, most of which we'll never be able to reach? The answer is light. And although light from distant parts of the universe can take billions of years to reach us, it carries six unique messages that, when put together, can disclose an amazing amount of information to astronomers who know how to look for it. Just as sunlight can be split up into the familiar rainbow, ...
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How and when did our universe begin? How did it get to look like this? How will it end? Humans have been discussing these questions for as long as they've been around without ever reaching much agreement. Today, cosmologists are working hard to find the answers. But how can anyone hope to find concrete answers to such profound questions? And how is it possible to explore and study something as huge as the universe, most of which we'll never be able to reach? The answer is light. And although light from distant parts of the universe can take billions of years to reach us, it carries six unique messages that, when put together, can disclose an amazing amount of information to astronomers who know how to look for it. Just as sunlight can be split up into the familiar rainbow, ...
