A person has always been interested in the question as far as the big world where he lives. The first real idea of the magnitude of the universe was obtained in 1990, when a Hubble telescope was launched on a low near-earth orbit. In the first years of his work, millions of galaxies were discovered, and their total number in the visible universe, according to the calculations of scientists, could be from 100 to 200 billion. And each of these galaxies contains billions of stars. Already then scientists were amazed by the true scale of the universe. But now it's time to surprise even more: the number of galaxies in the visible universe can be about 1 trillion, which is at least 10 times higher than previous calculations.
Scientists from the University of Nottingham made a discovery with the help of the same Hubble telescope. Representing the images obtained by a telescope in 3D format, scientists were able to study the distribution of galaxies in the Universe for billions of its expansion. As a result, they came to the conclusion that when the universe was "total" 1 billion years since a large explosion, the galaxies were distributed in space 10 times more denser than now. With the expansion of the Universe, some galaxies merged together and became quite large in order to be discovered by modern technical means. Other galaxies still remain in the shade and, based on mathematical models, which describe the sensitivity of the existing telescopes, such "invisible" galaxies 90% of the total number in the visible universe.
But already in 2018, when a telescope James Webb Space Telescope (James Webb Space Telescope), which, according to scientists, will be given to orbit, will be enough to catch the light of the most distant and dull galaxies.