Note on Galaxies and Constellation

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A galaxy is a huge assembly of stars, dust and gases, mutually held together by gravitational force . Millions of stars are present in the galaxy and the diameter of galaxy ranges from 1000 light years to one million light years. Our universe contains many galaxies and each galaxy has about billions of stars.

Types of galaxy:

  • Elliptical galaxy:
    :The galaxy which look like a flat elliptical disc are called elliptical galaxy.The stars of this type of galaxy are quite old and advance in evolution.It is the most common galaxy.
  • Spiral galaxy:
    A spiral galaxy consist of a center core part called nucleus above which system of arms and spiral out the number of arms which spiral about the nucleus may be one old and advance evolution. Adomic and milky way are spiral galaxy.
  • Irregular galaxy:
    The galaxy whose shapes are neither elliptical nor spiral but any irregular shape are called irregular galaxy.This type of galaxy are less brighter than the spiral galaxy.

Constellation:

Some of the stars in the galaxy stay in a group called constellation such group of stars staying in certain patterns can be seen clearly in clear moonless night. As looking from the earth, the group of stars resemble with some animals, a group of people, some object, etc . On the basis of what they resemble to,they are given different names. About 88 constellation are known sufor and 12 of them are considered as zodiac. E.g. Ursa major, Scorpio, Orion, etc.

  • A galaxy is a huge assembly of stars, dust and gases, mutually held together by gravitational force . Galaxies are of three types elliptical, spiral, and irregular.
  • The galaxy which look like a flat elliptical disc are called elliptical galaxy.
  • A spiral galaxy consist of a center core part called nucleus above which system of arms. Our galaxy milky way is also spiral.
  • The galaxy whose shapes are neither elliptical nor spiral but any irregular shape are called irregular galaxy.
  • Some of the stars in the galaxy stay in a group called constellation. They forms our zodiac sign.
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Very Short Questions

A group of stars forming the shape of particular object is called a constellation. So far 88 constellations are known. Leo, Ursa Major, Aries and Cancer are the four examples of constellation.

A big cluster of billions of stars that make up the universe is called a galaxy. There are three types of galaxy based on shape. They are elliptical, spiral and irregular galaxies. Our solar system belongs to the Milky Way which is a spiral galaxy.

Our solar system lies in the Milky Way galaxy that is spiral in shape.

Aries, Ceres, Charon, Leo, Moon, Titan, Ursa Major, Vesta. Aries- Constellation Ceres- Asteroid Charon- Satellite Leo- Constellation Moon- Satellite Titan- Satellite Ursa Major- Constellation Vesta- Asteroid

The two differences between galaxy and constellation are:

Galaxy Constellation
  1. It is a group of billions of stars that make up a universe.
  2. Its members revolve around the galactic center.
  1. It is the group of few stars that form the shape of a particular object.
  2. It moves from east to west.

The group of stars with definite shape is called constellation.

In the sky, 88 constellation are seen.

12 constellations are called RASHIS.

The constellations with signs of zodiac are Aries, Taurus, Gemini, Cancer, Leo, Virgo, Capricorn, Libra, Sagittarius, Scorpio and Aquarius.

Cassiopeia is one of the constellation which can be seen on the northern hemisphere.

There are three stars at the belt of Orion.

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  • Milky way is an example of ______.

    irregular galaxy


    barred-spiral galaxy


    spiral galaxy


    eliptical galaxy


  • Orion is an example of ______.

    Star


    Constellation


    Galaxy


    Solar Syatem


  • A huge assembly of stars, dust and gases, mutually held together by gravitational force is called ______.

    satellite


    a galaxy


    constellation


    solar syatem


  • The diameter of galaxy ranges from ______.

    1000 light years to 10000 light years


    10 light years to one million light years


    1000 light years to one million light years


    100 light years to one million light years


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DISCUSSIONS ABOUT THIS NOTE

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What is pulsar?

What is pulsar?


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suzu

what is the difference between galaxy and constellation on the basis of hypothesis?


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Sajina

What is milky way galaxy


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Milky way galaxy

Milky way is a medium sized galaxy, which consists of about150 billion' of star


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