relativity

What Time is It in the Universe?

by Fraser Cain August 28, 2014

Want to stay on top of all the space news? Follow @universetoday on Twitter Check your watch, what time is it? But wait, you’ve actually been moving and accelerating, and according to Einstein, everything’s relative. So what time is it really? It all depends… Remove this ad Fraser Cain on Google+

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Does Light Experience Time?

by Fraser Cain May 7, 2014

Have you ever noticed that time flies when you’re having fun? Well, not for light. In fact, photons don’t experience any time at all. Here’s a mind-bending concept that should shatter your brain into pieces. Remove this ad Fraser Cain on Google+

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The Secret of the Stars

by Jason Major February 27, 2013

“Say, do you like mystery stories? Well we have one for you. The concept: relativity.” Well look at that, it’s a new video from John D. Boswell — aka melodysheep — which goes into autotuned detail about one of the standard principles of astrophysics, Einstein’s theory of general relativity. Featuring clips from Michio Kaku, Brian […]

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Do We Really Need Dark Matter?

by Jason Major December 7, 2012

Hubble mosaic of massive galaxy cluster MACS J0717.5+3745, thought to be connected by a filament of dark matter. Credit: NASA, ESA, Harald Ebeling (University of Hawaii at Manoa) & Jean-Paul Kneib (LAM) Even though teams of scientists around the world are at this very moment hot on the trail of dark matter – the “other stuff” that the […]

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A Star’s Dying Scream May Be a Beacon for Physics

by Jason Major August 13, 2012

When a star suffered an untimely demise at the hands of a hidden black hole, astronomers detected its doleful, ululating wail — in the key of D-sharp, no less — from 3.9 billion light-years away. The resulting ultraluminous X-ray blast revealed the supermassive black hole’s presence at the center of a distant galaxy in March […]

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