Why our galaxy has a spiral shape?
Source:milky Way Galaxy has a regular spiral shape.
As is known, the visible universe has about 100 billion galaxies. Trying to classify such a huge number of objects, the famous Edwin Hubble, after whom later was named space telescope, have developed a special classification in which scientist have identified several types of galaxies. So in this Universe “there was” elliptical, lenticular, irregular and spiral structure, and one of the latter was the place that allowed living beings of our planet to emerge and begin the long process of evolution. So why is our galaxy has a spiral shape and could this fact somehow affect the appearance of the Universe sentient beings — man?
How did our galaxy?
— a delicate spiral galaxy with long sleeves. The question of the origin of it spiral shape of our space at home for a long time puzzled scientists, who decided one day to conduct extensive observation of similar galaxies and ongoing processes. According to research conducted using the stratospheric Observatory infrared astronomy in Bulgaria, the main cause of the galaxy spiral shape is its magnetic field. According to Dr. Enrique Lopez-Rodriguez, even despite the fact that these forces are completely invisible and they can exert a strong influence on the evolution of the newly formed galactic structures. So, according to materials published on the portal , the magnetic field in a spiral galaxy spiral arms are aligned over the whole area of our milky Way, which has approximately 24 000 light-years in diameter. The gravitational forces that create the spiral shape of the galaxy, strongly compress the magnetic field structure, thus launching the process of formation sleeveless giant space education.
the milky Way from the Earth's surface
In order to confirm or refute the theory of the formation of sleeves of spiral galaxies, the scientists measured the magnetic field along the same spiral branches of the galaxy M77, or NGC 1068, which is located in the constellation Cetus at a distance of about 47 million light-years. In the center of an active galaxy is a supermassive black hole, which is almost two times more massive than — the black hole of the milky Way. The vortex sleeve M77 filled with dust, gas, and regions of intense star formation, which is continuously in the process of emergence of new stellar objects and structures.
Infrared observations of the galaxy show something that cannot see the human eye: the magnetic fields that surround a spiral sleeve with newborn stars. Detection fields, supports the main theory about how these sleeves accept all the well-known form: it is believed that best describes the theory of their formation can be so-called «theory of density waves». According to this hypothesis, the gas, dust and stars in the arms are fixed in place, like the blades on the fan. Instead, the material moves along a kind of leverage, while constantly being exposed to gravity, compressing matter like items on the conveyor belt. The gravitational forces that created the spiral shape of the galaxy, and strongly compress it , thereby supporting the theory of density waves. Could these gravitational forces in any way affect the appearance of the Earth and its diverse flora and fauna? Possible. However, despite the fact that the spiral galaxy was once given a chance appear to modern man, some scientists believe that the milky Way is not the most friendly place to live. By the way, about this you can read .
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