Universe of humans is full of mystery, in which human beings are numerous Milky Way galaxy is just a member, while the number of stars in the Milky Way reaches one hundred billion, the sun is just a very ordinary star.
Universe of humans is full of mystery, in which human beings are numerous Milky Way galaxy is just a member, while the number of stars in the Milky Way reaches one hundred billion, the sun is just a very ordinary star. According to the survey research scientists, life on Earth may have originated from comets, asteroids and other celestial bodies of these free Earth evolved from single-celled life to the human experience for billions of years, this process appears to be very strange, about us come from topic is still enduring.
The oldest man in the history of the topic is where we come from, from philosophers, poets to mathematicians, physicists have put forward different views, most scientists believe that the universe we live experienced a big bang, about 13.7 billion years ago , the universe was born, in about 5 billion years ago, the birth of the solar system, and gradually evolved and now we see the eight planets. But we still do not have enough evidence to show that the universe come from, we can only piece together the story of the origin of the universe by capturing the afterglow of the big bang.
We can see almost all of the galaxies in the universe are moving away from us, it is because the universe is accelerating expansion among the one hundred billion galaxies in the universe has, the more distant galaxies moving away from us faster, the universe There are also many galaxies like the Milky Way. If the accelerating expansion of the universe, then it must be very small in the past, all substances are concentrated in a tight spot, at the moment of the Big Bang, time and space are given meaning.
Scientists have even calculated the age of the Big Bang, about at some point from 13.7 to 14 billion years ago, although we can not observe fast away from the galaxy, but can be determined by its emitted light, the red shift phenomenon discovered allows us to confirm that the universe is accelerating expansion.
Redshift phenomenon is relatively simple to understand, when a police car roaring past the red next to us, the same can be judged by the size of the sound away from us or close to us, a similar effect can be used to determine whether these galaxies away from us on spectral analysis and go there because of the nature of light wave, when galaxies moving away from us, waves will be stretched, long wavelength corresponds to red, so we’ll see redshift in the spectrum.
The birth of the universe needs to study very early universe left to find information, the scientists found that after the big bang afterglow retained in space, this is the microwave background radiation, although we can not see with the naked eye, but some specific wavelength telescope, Furthermore universe or other forms of radiation, such as X-ray, infrared, ultraviolet and microwave, our eyes have seen just a short spectrum of visible light on.
After the Big Bang in the entire universe filled with incredible radiation, as the universe continues to expand, these lights can survive in the microwave band, if we have a job in the microwave band telescope, you can see the birth of the universe When the ancient light, in fact, we already detect the presence of ancient light, whether it is day or night, the sky can be detected, so that light is also known as the cosmic microwave background.
Modern technology is quite powerful telescopes, we can capture light billions of years ago, or even close to the very early universe after the Big Bang, and if we detect light one million light-years away, which means that we have seen in the past . Scientists recently found some gas clouds at about 12 billion light years away, where there may be clues about the universe, the origin of life, because these gas clouds of different ingredients and modern gas clouds, shortly after the birth of the universe in a different kind of gas clouds some chemical elements .