Universe is expanding

Let us imagine an astronomer who is at the center of the universe. What did he see? All the stars, galaxies and nebulae are rapidly moving away from it. It is hard to imagine but the picture will look like it is such an amazing way. The remarkable resolution of these difficulties was the assumption that the universe is expanding.

It is possible to postulate that the universe is expanding

Consider in fig. 1(a), a small balloon. Suppose an astronomer is at the point, which is marked with a cross. The black dots denote the surrounding nebula. Inflating balloon, we see (1b) that each point (nebula) is removed from the cross (astronomer). But they move so that the speed of each point is proportional to its distance from the astronomer. Thus, the motion near the cross slowly, and at a greater distance fast. The analogy is turned full. It is possible to postulate that the universe is expanding, and then all of the nebula will be removed from us. Thus, the removal rate is proportional to the distance.

This theory provides another great result. If the universe is expanding, but today it is more than yesterday, and much more than last year. If we could go back in time, the universe would have to shrink.

But, maybe, the universe is a vibrating system? Today we found the process of expansion, and after many millions of years, the expansion starts to slow down, then stop and go into compression? If so, the time we decided problem. Why swing should be the first ever committed by now, if the universe is really fluctuates over millions and billions of years. Maybe the universe is made of billions of billions of vibrations? It can be concluded that the time should be infinitely.