In 1929, astronomer Edwin Hubble discovered that all galaxies were moving away from us on average and that, stranger still, those that were twice as far away moved twice as fast. And those that were three times farther away moved three times faster and so on. Everything was moving away from us. This is called Hubble’s law.
Hubble had demonstrated, by observing the motion of these galaxies, that the universe is expanding. In theory, an expanding universe must have started from a single point, because if we went back in time, all the galaxies would come close to each other and collide to a certain point called the Big Bang.
It is possible that galaxies would approach each other. However, their collision at a same place is just as illusory as our future collision with all the blue-shifted galaxies, because there is a difference between approach and collision. If you walk down a road, you can see the cars on the road approaching and then receding. Similarly, if you went back in time, most galaxies would pass each other without colliding.
Moreover, the existence of blue-shifted galaxies is another proof that the Big Bang theory is wrong. How is it possible that in an expanding universe thousands of blue-shifted galaxies approach the Milky Way?
I think Edwin Hubble’s observations can be explained by Newton’s first law: A body remains at rest or moves at a constant speed in a straight line, unless a force acts on it. If we run at our own constant speed in a straight line, everyone will see the others moving away from each other.
