How big is the Universe? <br />Is the Universe infinite? The distance from the "end" of the observable universe, <br />is 46 billion light years, <br />but that does not mean that it ends there, <br />since it is constantly expanding. <br /> <br />What existed before the Big Bang? <br />So far, scientists can not imagine, what was in the universe before the Big Bang, <br />even if there was a Universe! <br /> <br /> <br />What will be the end of the Universe? <br />Theorists believe that the Universe began with the Big Bang, <br />but there are still many doubts as to how it will end. <br />It is not possible to know, <br />if the Universe will continue to expand to the point of disintegration of all matter, <br />the Big Rip, or if the expansion will cease, and the spatial plane go into condensation, <br />the so-called Big Crunch. <br /> <br />We are alone? <br />The question that does not want to shut up: <br />are we alone in the Universe? <br />in the 1960s, <br />astrophysicist Frank Drake posited a controversial equation suggesting that, <br />taking into account several factors, <br />the probability of life elsewhere is extremely high. <br /> Drake counted the formation of new stars, the number of stars with planets, <br /> the combination of conditions for the existence of life, <br /> among other specifications. <br />We have not yet found life in any corner of the galaxy, <br />but that does not mean we should lose hope. <br /> <br /> <br />Parallel universes? <br />We may not be alone and may not be unique. <br />The theory of physical researchers, <br /> is that we can be in a multiverse, <br /> with other parallel universes. <br />Speculation suggests thinking of our universe as a bubble, <br /> like a snow globe, <br />and what other alternate universes exist within its own bubbles. <br /> Despite being a concept very close to the classics of science fiction, <br /> astronomers look for evidence that indicates points of collision between the universes. <br /> <br /> <br />What is dark matter? <br />In the cosmological model accepted by the scientific community, <br />the Universe is composed of energies and particles that interfere in the gravity, <br />expansion and acceleration of the space. <br />It is believed that 73% of the density is constituted of dark energy, <br />which would have the effect of negative pressure on the Universe, <br />and 23% of dark matter, <br />which hypothetically has gravitational effects on visible matter. <br />Because it is completely invisible to telescopes, <br />and because it does not emit light or electromagnetic radiation, <br />dark matter is extremely difficult to study. <br />Scientists speculate that, <br />it is made up of subatomic particles different from those of visible matter, <br />but its gravitational effect is noticeable in the movements of galaxies, and stars. <br />One of the main features, for the study of dark matter is the design (Alpha Magnetic Spectrometer), <br />on the International Space Station, <br />which collects data on the flow of cosmic rays into Earth orbit.
