Universe, stories, pictures, wallpapers
Say famous
All    Landscape    Building    Museum    Playground    



Our galaxy

Our galaxy (Picture 1)


The Milky Way is a rotating galaxy like a stick, which includes billions to hundreds of billions of stars, and a large number of clusters, nebulae, and various types of interstellar gases and dust, from the Earth to see the Milky Way is surrounded by the sky of silver White ring. The total mass is about 210 billion times the sun. The Milky Way is a flat sphere with a huge disk structure consisting of a brightly dense core, two main swivel arms and two unropened arms. The swivel arms are 4500 light-years away. The sun is located on the arm of a galaxy arm, to the center of the galaxy is about 26,000 light years.

The center of the Milky Way is a large mass of black hole (Sagittarius A), from inside to outside, respectively, by the silver heart, silver core, silver plate, silver halo and silver crown composition. Most of the central part of the Milky Way galaxies are older stars (dominated by white dwarfs), and most of the peripheral areas are newborn and young stars. The Milky Way grew itself by slowly swallowing the surrounding dwarf galaxies. In March 2015, scientists found that the volume of the Milky Way was 50% larger than previously thought. The latest research shows that the Milky Way should be a rod spin galaxy.

90% of the Milky Way is a star. The variety of stars, according to the physical properties, chemical composition, spatial distribution and movement characteristics, the stars can be divided into five stars. The youngest of the extreme star family Ⅰ stars are mainly distributed in the silver plate in the arm; the oldest extreme star family Ⅱ stars are mainly distributed in the silver halo. Stars often gather into groups. In addition to a large number of binary, the Milky Way has been found in more than a thousand clusters. There are gases and dust in the Milky Way, which accounts for about 10% of the total mass of the Milky Way. The distribution of gases and dust is uneven, and some gathers nebula, and some are scattered in interstellar space.

In 1971 the British astronomer Lyndon Bell and Martin Ness had analyzed the infrared observations and other properties of the central area of the Milky Way, noting that the energy of the center of the Milky Way would be a giant black hole and predicted that if their hypothesis was correct, A small source of radioactive radiation can be observed and the nature of the radiation should be the same as the radiation properties observed in the ground synchrotron. Three years later, such a radiation source was really found, which is the Sagittarius A. It is issued a strong radioactive radiation, infrared radiation, X-ray radiation and γ-ray radiation, the nature is not clear.

  Previous article:  
Advertising section
About us   Disclaimers   Privacy policy   © 2021 sayfamous.com   Mobile version