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Science in Seconds - Gravity

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Science in Seconds Know Everything RANTS - Gravity Rheanna Sand: Gravity, why do you have to be such an elusive bitch? You're there, we can all feel your effects, but we don't know what you are. You're the only force not accounted for in the Grand Unified Theory. You plagued Albert Einstein until his death in 1955. And not even Stephen Hawking has figured you out. Ok, when it comes to gravity, what has gotten all the great minds confounded is its simplicity. Objects with mass attract each other: if you have more mass, you have more gravity; if the objects move closer together, you have more gravity. Objects like us or the planets stay together as a unit. Even though the universe is continually expanding and other nuclear forces are pushing our particles away from each other, gravity keeps everything in balance. But science has yet to come up with one common theory that unites large-scale, planetary gravity with small-scale, subatomic gravity. Newton envisioned gravity as a force acting on objects, curving their path in space-time. Einstein saw it as a curvature of space-time itself, with objects traveling in a straight line, but taking an apparently curved path. Quantum ideas, like string theory, are a bit different. They postulate that all particles can be boiled down to vibrating strings of energy. Some of these are closed loops and some of them are open. But if it's a closed loop, and has two units of spin and zero mass, it has the right properties to be a graviton, the particle of gravitational force. Wherever you have gravitons, you have gravity, just like wherever you have photons, you have light. But gravitons have never been observed. This is yet another problem being addressed by particle accelerators like the Large Hadron Collider at CERN. And until they are, we'll just have to live with that big, elusive tease, constantly reminding us how stupid we really are. But maybe that's not so bad after all. Courtesy of Science in Seconds – All rights reserved Only for educational/non-profit purposes. (Translators are invited to put their name here)

Video Details

Duration: 2 minutes and 13 seconds
Year: 2010
Country: United States
Language: English
License: All rights reserved
Producer: Science in Seconds
Director: Science in Seconds
Views: 53
Posted by: tradottiinitaliano on Sep 10, 2011

Gravity, why do you have to be such a tease? Science just can't figure you out! (Note: Adult language)

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