How Can Galaxies Travel Faster Than The Speed of Light?

How Can Galaxies Travel Faster Than The Speed of Light?

Hubble ultra deep field NASA.jpg


As we look at the galaxies around us we can measure that they are travelling away from us, probably as a result of the unknown force of dark energy. The further the galaxies are, the faster they seem to be travelling and some may even exceed the speed of light. But the speed of light is the speed limit of the cosmos, so how can a galaxy travel faster than it? The answer is that the fabric of space is expanding faster than light and taking the galaxies with it and the fabric of space is not limited by the cosmological speed limit. So the galaxies are not actually travelling faster than light, but the space that they reside in is. Kind of like a surfer on a wave. The surfer is the galaxy and is riding the wave of space time that is expanding and moving faster than the speed of light.

Image by NASA and ESA

 

Read more here

 

http://www.universetoday.com/13808/how-can-galaxies-recede-faster-than-the-speed-of-light/

 


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