Introduction

A look up at the sky at night uncovers an expansive broad strip of light. This captivating line of light is the focal point of our universe, as observed from one of its external arms. Understanding the structure of the Milky Way has always been a difficult challenge as the Universe is huge enough to study. The close planetary system sits on the external edges of one arm in a circle of material. Cosmic systems are rambling frameworks of residue, gas, dim issue, and anyplace from a million to a trillion stars that are held together by gravity. Almost all enormous systems are thought to likewise contain dark gaps of huge masses at their focuses. In our system, that is the Milky Way, the sun is only one of around a hundred to four hundred billion stars.

Many observations and debates had been done on the Milky Way. Everybody was eager to know the reality behind this mystery. The band of light was first resolved into separate stars by a renowned space scientist “Galileo”, with his telescope. Galileo's discoveries are very famous.Cosmologists imagined that every one of the stars, known to mankind, is contained in the Milky Way. This assumption was done at the start of the 1920s. There was a big debate between Harlow Shapley and Heber Curtis about the topic.  Later on, observations were made by Edwin Hubble and he brought up a conclusion that the Milky Way is actually one of the galaxies.

Milky Way Galaxy

Galaxy contains a star and many planets revolving around it. This galaxy is known as Milky Way Galaxy. The more profound we investigate the universe, the more cosmic systems we see. One examination was done in 2016 that evaluated that the perceptible universe contains two trillion or 2,000,000 million galaxies. A portion of those far off frameworks resembles our own Milky Way world, while others are very distinct. Milky Way is probably the only galaxy where life exists. What bounds the gas, dust and the big group of stars in the galaxy, is the gravity. The Milky way system is an enormous banned winding spiral galaxy. There are stars of various shapes and sizes. We see stars at night and wonder they are near but in reality, they are very far and appear in our Milky Way. The name Milky Way was given to our galaxy since it shows up as a smooth band of light in the sky when you see it in an extremely dark area. Since there are many stars in the galaxy, so it is difficult to count their number from the position where we are. An estimate says that there are around a hundred billion stars.

A light-year is mostly used to express astronomical distances. Since our solar system is much far away from the galaxy, so we can somehow say that solar system lies about twenty-five thousand light-years away from our galaxy.Our world likely contains hundred to four hundred billion stars and is around one hundred thousand light-years over. That sounds enormous, and yet it is. The Andromeda galaxy, known to be our neighboring galaxy, is around two hundred and twenty thousand light-years wide. We live in the outskirts of the galaxy.Just like the Sun circumvents the focal point of the Milky Way, the Earth circumvents the Sun. So, it takes almost two hundred and fifty million years for our sun and the planetary group to go right around the focal point of the Milky Way.

What NASA says about Milky Way

The National Aeronautics and Space Administration (NASA) is the US government agency that is in charge of aviation research, air transportation, and the ordinary citizen space program. Where explorers chart the continents of the globe, out astronomers have engaged themselves in making up the map of the spiral structure of the Milky Way. Utilizing infrared pictures from NASA's Spitzer Space Telescope, researchers have found that the Milky Way's exquisite winding structure is overwhelmed by only two arms. Beforehand, our cosmic system was thought to have four noteworthy arms.

NASA’s James Webb Space Telescope is the most dominant as well as complex space telescope. It will investigate the universe utilizing infrared light, from planets and moons inside our close planetary system to the most antiquated and far off galaxies.When we talk about the tremendousness of the universe, it's easy to hurl out enormous numbers, however progressively hard to fold our brains over exactly how huge and far various divine bodies truly are.

At the focal point of the spiral, a great deal of vitality is generated along with clear flares, once in a while. In light of the massive gravity that would be required to clarify the development of stars and the energy discharged, the space experts infer that the focal point of the Milky Way is a dark hole having a mass of millions or billions of times than that of the sun.Different galaxies have different shapes. Some galaxies have circular shapes, and a couple of others have strange shapes just like toothpicks or rings.

 

Andromeda Galaxy:

Andromeda Galaxy is the spiral galaxy that is the approximately 780 kilo parsecs from the earth. Thefirst person that can describe about the Andromeda galaxy is Abs al-rahman al-Sufi. This galaxy is the most nearest to the Milky Way galaxy. This galaxy has the satellite galaxy that can be the best satellite galaxy. The diameter Andromedagalaxy is about the 220,000 light years.     

   

  1. Antennae Galaxies:

Antennae Galaxies is located in NGC 4038 group. This galaxy can be located on the 0.25 degree north and 3.25 degree from the south west. This galaxy can contain the collection of the massive globular cluster. In this galaxy there are the large amounts of the X-rays can be found like neon, silicon, and magnesium.

  1. Black Eye Galaxy:

Black Eye Galaxy is located about the 17 million light years. Itcan be discovered by the Edward Piggott in the March 1179. This galaxy is appeared in the small telescope. The diameter of this galaxy is about the 54,000 light year.in the central region of the black eye galaxy the source of the radio emission is weak  and has the x-ray source can be found.   

  1. Bode's Galaxy:

TheBode's Galaxy is known as the messier 18 and it is a spiral galaxy. The distance of this galaxy is about the 12 million light years. This galaxy is the half of the Milky Way. This galaxy can be discovered the first time by the Johann Elert Bode on the December 1174. The diameter of this galaxy is about the 90,000light year. It can be viewed by the small telescopes.        

  1. Cartwheel Galaxy:

Cartwheel Galaxy is located about the 500 million light years. The velocity of this galaxy is about the 217 km/s. this galaxy is called the spiral galaxy.  This galaxy is the larger than the Milky Way and the diameter of this galaxy is about the 150,000 light year. The Fritz Zwicky can be discovered this galaxy in the 1941 and the shape of this galaxy is the unusual. The large number of the black hole can be found in this galaxy.

  1. Cigar Galaxy:

Cigar Galaxy is also known as the Messier 82 that is approximately 12 million light years. This galaxy is the part of the M81 group and can be the closest to earth. This galaxy is called the starburst galaxy. TheJohannElert can discover in the 1774. The structure of this galaxy is about the irregular galaxy.

  1. Circinus Galaxy:

Circinus Galaxy can be seeingusing the small telescope and it is the seyfert galaxy. This galaxy is the closet to the Milky Waygalaxy. The supernova can be produced by the Circins galaxy during the 2001. The 4.0 Mpc is the distance of this galaxy and it can be located in the galactic plane at below the degree of 4.

  1. Comet Galaxy:

Comet Galaxy is the part of the spiral galaxy. The more mass of this galaxy as compered the Milky Way and it can be located the 3.2 billion light years. The first time detection of this galaxy can on the march 2007. The length of tis galaxy is the 600,000 light year. The temperature of this galaxy is the high that is about the 100 million degree. This galaxy is 3.2 billion light year from the earth.

  1. cosmos REDshift 7:

CosmosREDshift 7 is the red shift galaxy.  This can be the observed after the big bang that is about the 800 million light years. Thisgalaxy that can discover the first start thatgenerate the chemical elements and it is called the oldest galaxy.

  1. Hoag's Object:

Hoag's Object is the type of the ring galaxy that can discovered in the 1950. this galaxy is the older galaxy of the yellow star in the center. The diameter of this galaxy is the 6 arcsecondand it is larger from the Milky Way.

  1. Large Magellanic Clod:

Large Magellanic Clod is the satellite galaxy at the distance of the 50 kiloparsecs. This is 2nd closed galaxy to the Milky Way galaxy. The diameter of this galaxy is about the 14,000 light year. In the local group of the galaxy it is the 4th largest galaxy. The stellar bar can contain this galaxy. Themodern telescope can be discovered this galaxy.

  1. Milky Way:

TheMilky Way can be visible from the earth and it can contain the solar system. The diameter of the Milky Way is about then 150,000 + and there are the many billion stars and planets can contain. This galaxy is the third largest galaxy. The massof the Milky Way is about the trillion times larger than the mass of the sun. TheMilky Way is can be constantly rotating.

  1. Pinwheel Galaxy:

Pinwheel Galaxy is the spiral galaxy and there distance from the earth is about the 21 million light years. This galaxy can be discovered in the 1781 by the PierreMechain. The diameter of this galaxy is about the 170,000 light year. Thestar that contains this galaxy is about the trillion. The x-ray source is present in this galaxy.