Is this thought experiment valid or workable?

 

IF we visualize our galaxy in a very large Galaxy CONTAINER.

 

Is it possible that our galaxy (in the container)

is travelling at the speed of light?

IF observed from the reference frame

of a second galaxy moving opposite to ours?

 

Within our galaxy container, all solar systems including ours

behave normally. This is a question about the scalability of a reference frame

 

Is this thought experiment valid?

Or have I confused something or many things...lol?

 

Thanks,

My answer would be no. No matter how you chunk it together, a galaxy is still a galaxy. Your container would mean that all the particles in the galaxy are moving together in some sort of way I suppose? In any case, observed from any other frame, the galaxy, which has mass, cannot be observed to be travelling at the speed of light. Time dilation will occur relative to the two bodies observing each other. As you know, velocity is dependant on time, and such the speed of light travel is not observable.

Thanks. That's helpful and clear.

 

very best

 

eon_rider