The Galaxies In The Universe; Its Composition And Classification

The Galaxy is composed of stars, gas and dust that are held together by the force of the gravity.There are thousands of galaxies in the universe that are observed and taken with photographs with astronomers.Some of them are found to be alone in space while the other galaxies are clustered in groups.Clustered galaxies may contain few galaxies or several galaxies; some reach up to thousands.

Galaxies differ in their sizes; some of them are giants and the others are dwarf.The diameter of the largest galaxy is about 192,000 light-years while the diameter of the smallest known galaxy is about 6600 light-years.

The solar system consists of our sun and the nine planets including the Earth belong to the Milky Way galaxy.This galaxy has an estimated 200 billion stars including the sun.

The brightest part of the Milky Way galaxy lies in the constellation of Sagittarius.In the Southern Hemisphere, it passes through the Cassiopeia constellations and Cygnus constellations while in the Northern Hemisphere; it passes through the Southern Cross constellation and Scorpio constellation.

The scientist and astronomers had classified the galaxies in the universe in accordance to their appearance and shape.Galaxies are different in their shape and appearance; some galaxies are Spiral, the others are elliptical and the others are irregulars.

Our galaxy, the Milky Way is within the cluster of galaxies named as the Local Group.There are different shapes of galaxies in this group; some galaxies are irregular, others are spiral while the others are elliptical.

In Spiral galaxies, there are bulges or nucleus and in here, several arms may come out consisting of dust and stars.Few stars also exist between these arms.Some Spiral galaxies are classified in accordance to how open their arms; these classifications are S2, Sb and Sc.Sba, SBb and SBc are used to classify the galaxies with arms that extend from a bar of stars in the nucleus; they are called as “barred” spirals; some other galaxies are designated as S0; they are Spiral galaxies which have no arms.

The Elliptical galaxy is considered as the most common type of galaxy.From elliptical shape, they range from almost spherical to a flattened disk-like shape.The Elliptical galaxies that are almost spherical are designated as E0 galaxies.The Elliptical galaxies that are less spherical are designated as E3 galaxies.The Elliptical galaxies that are flattened are designated as E7 galaxies.Some Elliptical galaxies are found to be small while other Elliptical galaxies are very large.

The Magellanic Clouds are the nearest neighbors of the Milky Way in the Space.The Large and the Small Magellanic Clouds are just two of the four Irregular galaxies that can be found in the Local Group from where the Milky Way galaxy also belongs.

The Large Magellanic Cloud is about 38400 light-years in diameter and it is visible with the naked eye when seen from the Southern Hemisphere.The Small Magellanic Cloud is only about 19 light years in its diameter.

Article Written by varron

I am a freelance online writer


Post Your Comment

Related Articles

  • Narration Type Of Composition; Classification And Elements

    There are many kinds of composition and one of these is the narration composition.

    The narration is a kind of composition in which the events either it is an imagined events or a real one is recounted. In here, the events are presented according to the order of their occurrence or arrange according to the order of time.

    The two general classification of narration are the objective narration also called as the narration of fact and the subjective narration also called as the purely imaginative narration.

  • The Communication And Cognitive Components Of Culture

    Different cultures have considerable variations but all of these cultures share four components namely; communication, cognitive, material and behavioral components.

    Communication components are divided into the language and symbols. Language is said to be as the core of all culture. A group of people that shares language shares a condensed, very flexible set of symbols and meanings. With this communication became possible and provides basis for symbolic interaction among humans along with the non-verbal communication and symbols.

  • The Use Of Paralanguage In Communication

    Language is a very important element in communication. There are about thousands of languages and dialects that are used by humans throughout the world in order to communicate with one another. Some of these languages are very influential that they are used in some other countries. Other languages are just used in a single region or just used by a group of people or a single village and termed as their local dialect. Languages all over the world have their own survival history for some of them developed and expanded and some became extinct.

  • The Kinds Of Comets; Its Tails, Composition And Shape

    The Universe is full of wonders; its size is so amazing as well as the things within. The galaxies, the stars, the planets, the asteroids the comets and others are the things or bodies that can be found in the universe.

    The existence of comets in the sky particularly in the night sky is an important scenario in the ancient times. When seen, the ancient people usually associated comet as a sign of fortune and has a great impact in their life; whether it is positive or negative.

  • The Basic Types Of Speeches; Informative, Evocative, Entertainment, Argumentative,Persuasive

    Human relations involve a variety of social functions. This is the reason why there are different types of speech-making styles that caters for the different occasions. These different styles of speeches differ from their degree of intimacy and formality in consideration of the members of the gathering groups. The knowledge of the basic type of speeches will make it easy for the speaker to adapt in approaching his subject as will as to his or her audience.

  • Earth Is A Big Magnet

    The Earth is a great natural magnet . It has north and south magnetic poles, a magnetic axis and a magnetic field. Its magnetic field extend far out into space.

  • Phonemes, Semantics, Grammar And Pragmatics: The Four Components In The Study Of Language

    There are different languages and dialects in the world. Some are widely use while some are only used by a small village or by a group of people. Despite of differences from language to language or dialects to dialects, they share some common characteristics.

    There are four areas in the study of language; these are the phonology, the grammar, the semantics and the pragmatics.

  • The Different Special Types Of Speeches

    There are special types of speeches; these speeches are the After Dinner Speech, the Speech of Goodwill, the Speech of Courtesy, the Speech of Welcome, the Speech of Response to a Welcome and the Speech of Farewell.

    In the after the dinner speech, the speaker must talk in a clear as well as in attractive way. His or her speech should not be dug along. It is also important to make use of illustrations, humor or comparison and contrast in developing the speech.

  • Saving Hotel Reservations

    Hotel room booking is an essential factor to think about particularly if you are preparing to go anywhere else. This will guarantee you that you have a location to stay in particular place in which there are extensive volume of guests such as on destinations that are hosting particular occasions.

    Hotel room booking could be a frustrating experience taking into consideration that you will likely to research and examine for several hotel room prices, without having to compromise the full satisfaction on service.

  • The Different Schools Of Psychology

    There are different schools in the study of psychology namely; the structuralism, the functionalism, the Gestalt psychology, the behaviorism, the psychoanalysis, the humanism and the cognitive psychology.

    Structuralism deals with the study of the structure of the mind as well as on the elements that are associated with it. The advocated of structuralism used the method of Introspection, this school of Psychology are lead by Wundt and Titchener.