Isn’t this idea included or a product of the Big Bang Theory?
The second part of the question is, how come there are new galaxies being discovered if the universe is expanding faster than the speed of light?
Does light travel an infinite amount of distance? Isn’t luminosity or intensity of light a thing?
In: 7
There is something called the Doppler effect basically as things move away from you the waves created by the retreating object flattens out any waves from the object this is why the note from a siren changes when it passes you, for star this means the wavelength of light flattens which changes light towards a more reddish colour this red shift can be observed in all the stars around us and other galaxies so they are all moving away some at very fast speeds.
Latest Answers