Monday, June 3

Milky Way Center

Introduction to milky way center:

Milky way  having a huge group of stars and spatial bodies .Our sun belongs to milky way galaxy While we look at the sky there are infinite numbers of stars. The common question that arises in our minds is how the stars are distributed in the space. Astronomers found that the stars are occurred in the huge groups. These large groups  of stars are called as the  Galaxies.

Explanation about the milky way galaxy center:

Galaxy:  This is a part of universe that has a huge group of stars and other celestial bodies nebulae, and interstellar material bound together by gravitational force is called as Galaxy.

Milky way galaxy having a  huge group of stars in the galaxy is held together by the gravitational attraction between them. A part from stars this  milky way galaxy having a huge cloud of gases at the center which  called as Nebulae (Birth place of new stars) A milky way galaxy may have planets and other celestial bodies. The minimum stars that contain in the  smallest galaxies are about 1000,000  stars  while  the  largest  contain  up  to  3000  billion  stars. It is estimated that there are around 100 billion galaxies in the universe. One important thing is Sun belongs to Milky Way Galaxy.Understanding fourth state of matter is always challenging for me but thanks to all science help websites to help me out.

Galaxy types-Milky way center

Types of galaxies:

Galaxies have different shapes and based on the shape of alignment of the stars it has divided into three types

Spiral galaxies

elliptical galaxies

Irregular galaxies.

Elliptical and Irregular galaxies

Spiral galaxies:

In a spiral galaxy the stars forms a big spiral pinwheel with radiating from the from the central hub. The Milky Way galaxy is an example of spiral galaxy. The word milky way word name derived from the Roman word “via galactic” which means the road of milk. Most of the galaxies in the milky way galaxy lie in a disc shaped region called galactic disc.

The central part of the disc is thicker and bulges on both the sides like a old fashioned sandwiched toaster. The density of stars in the bulge region is higher than the outer side. Starting from the center bulged region group of stars spread out of arms our sun is located in one spiral arms .The sun takes about 250 million years to complete one revolution around the galactic center.

Elliptical galaxies:

In an elliptical galaxy the stars are confined to a region mainly in ellipsoid volume.Here the group of stars in this galaxy shapes like egg like structure.Hence it got it names as elliptical structure. The elliptical galaxies are described by the American scientist “Hubble”.Most Elliptical galaxies are composed of older low mass stars with interstellar medium.These type of galaxies will be around 10-15% in the universe.

Irregular galaxies:

In irregular galaxy the alignment of group of stars are fashioned in a irregular manner .It doe not having a peculiar shape. Hence they got the name irregular galaxies. This type of galaxies is useful in understand the overall evolution of the galaxies. These are having a low Metallicity rate and high level of gases and seem to be the earliest galaxies that populated in the universe.

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