## How to calculate rate of the universe expansion?

The zero-zero component of the Einstein’s equations for gravity with the metric of the expending universe is called the Friedman equation. We use this differential equation to calculate the behavior of the expending space. The equation includes two unknown functions … Continue reading

## What is a closed universe?

Hesitating between continuing the expansion and the transition to contraction The curvature of space of the universe is one of the factors that determine the law of its expansion. Data of observations do not contradict the fact that three-dimensional space … Continue reading

## How did the pace of expansion of the universe vary?

On changes in the rate of expansion of space In the first moments after the Big Bang, stretching the space of the universe occurred maximally rapidly, and the distance between the points grew from those microscopic to, possibly, exceeding the … Continue reading

## How is the expansion of the universe going to end?

The expansion rate of the universe is governed by three major factors: its matter density, the curvature of the three-dimensional space and the density of invisible energy called dark energy of unknown nature. With the expansion, the density of … Continue reading

## What is the distortion of space-time?

Going on a long winding path Since men can visualize two-dimensional surfaces in three-dimensional space, they use them to illustrate the topology of spaces of higher dimension. Deviations from the simplest topology are called the distortions of space. The sheet, … Continue reading

## What is called the curvature of space?

Moving along the spaces that are slightly not flat… At the beginning of the XIX century, it became clear that, in addition to the usual-for-eyes Euclidean space, there may be spaces with other fundamental properties. First, Lobachevsky has studied hyperbolic … Continue reading

## What happens to space after the Big Bang?

On the steady increase in all distances… After the Big Bang which occurred about fourteen billion years ago, space is expanding. It is possible to visually imagine the expansion looking as a figure drawn on the surface of a balloon … Continue reading