How does Hubble's Law support the Big Bang Theory?

Question

anonymous · Answer

Hubble's law say that there is a proportionality constant $H_0$ such that, the velocity that an object that is some distance $d$ from the observer is travelling at a velocity $d\cdot H_0$ away from the observer. Note that as the distance increases, so does the velocity, and note that everything is moving away from each other. One possible cause? A single point event that expanded into the known universe.

Much like any two points in a balloon get further away from each other as you blow it up (try any two points on the area that expands), so does the universe and the objects within it.