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Are stars moving apart faster than the speed of light?

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The answer is: Yes and no. Let's start with the no: When you add the velocities of two objects in the framework of relativity, you have to use the relativistic Velocity-addition formula: [math]s = {v+u \over 1+(vu/c^2)}. read more

", then the answer is yes, there are many pair of stars that are moving apart faster than the speed of light, just not for the reason you think: it's because of the expansion of space, not because of addition of velocities. read more

I've also said "nothing can travel faster than the speed of light". And then I'll say something like, " galaxies are moving away from us faster than the speed of light." There's more than a few items on this list, and it's confusing at best. read more

The Tully-Fisher relation is much like the mass-luminosity relationship, except that the galaxy's rotation is used to find its mass; the greater the mass, the faster the rotation rate. True Our own Local Group is dwarfed by the much larger Virgo Cluster, about 50 million light years distant. read more

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