Distinguished astronomer Carl Sagan believed that through us , the universe knows itself, because we are an integral part of it. All living beings on our planet and each of 7,7 billion people made of Stardust, which was recovered from the cores of stars in the explosion of a supernova. When the life cycle of massive stars nearing the end of these heavenly bodies increase its brightness and then slowly fade. As a result, the evolutionary process of the nuclei of stars are destroyed, releasing in interstellar space an enormous amount of energy and chemical elements — the building blocks of life. But what happens to them after the explosion?
The life cycle of stars
As if we didn’t like, but life ends sooner or later. And it’s not just us. Planets, stars, solar systems and even galaxies do not live forever. Thanks to the astronomical observations we know that every star has its own life cycle. But in the vast infinitely expanding Universe, everything changes. Thus, the fusion processes in the cores of massive stars are the cause of the explosion of a supernova, then those stars find a second life. After the explosion of the nucleus becomes very dense. It was so born neutron stars are the densest objects in the Universe that quanta collapse into the dark black holes.
The nature of supernovae have long been unclear. The fact that we learn about what happened the explosion after the fact, at the moment when the light from the flash reaches our planet. But these explosions produce not only a neutron star. So, a nebula, the crab nebula for example is nothing like the supernova remnant of SN 1054. It was the result of a supernova explosion that left behind a cloud of gas and dust that extend for thousands of light-years. Such nebula live because the remnants of supernovas start your new life cycle as a neutron star.
The collapse in the lens of the Hubble telescope
Space telescope Hubble has given the world many amazing pictures: billions of galaxies pillars of Creation supernova — nothing went unnoticed. However, not long ago, Hubble captured a rare phenomenon — the first star began to explode, and then all of her gas pulled back into a black hole in the center. Turns out the supernova immediately collapsed into a black hole. Astronomers believe that the reason lies in the huge mass of stars and the processes inside the nucleus. Such events are rare and are called “mass failure”. Usually astronomers do not jump to conclusions, however, monitor a star located in the galaxy NGC 6946, which was bright enough to see it at a distance of 22 million light years, then instantly disappeared, which suggests that the main culprit of the mysterious disappearance became a supermassive black hole.
Note that black holes, the existence of which is officially confirmed today — one of the most mysterious objects in the Universe. So, if the universe really knows itself through us, then can we know ourselves by studying the Universe? In any case, issues to date, more than answers. However, due to space telescope we saw the birth of a black hole, which in itself is amazing, isn’t it?