A huge system of stars is called _____ .
  • a)
    Moon
  • b)
    Earth
  • c)
    Galaxy
  • d)
    Planet
Correct answer is option 'C'. Can you explain this answer?

UPSC Question

Lotifa Rouson
Jan 18, 2019
Galaxy

Lovisha Chillana
May 31, 2018
A galaxy is a huge system of billions of stars and clouds of dust and gases. Millions of such galaxies make the universe.

A galaxy is a group of many stars, with gas, dust, and dark matter.[1][2][3][4] The name 'galaxy' is taken from the Greek word galaxia meaning milky, a reference to our own galaxy, the Milky Way.



Gravity holds galaxies together against the general expansion of the universe.[3] In effect, the expansion of the universe takes place between groups of galaxies, not inside those groups. Gravity holds the galaxy together, and the same applies to groups and clusters of galaxies, such as our Local Group in which the Milky Way is located,and the Virgo Cluster, a collection of more than 1,000 (might even be 2,000) galaxies. The gravitation is produced by the matter and energy in a galaxy or group of galaxies. Everything in a galaxy moves around a centre of mass, which is also an effect of gravity.

There are various types of galaxies: elliptical, spiral and lenticular galaxies, which can all be with or without bars. Then there are irregular galaxies. All galaxies exist inside the universe. The observable Universe contains more than 2 trillion (1012) galaxies[5] and, overall, as many as an estimated 1×1024 stars[6][7] (more stars than all the grains of sand on planet Earth).[8]

There are galaxies of different sizes and type. Typical galaxies range from dwarfs with as few as ten million[3][9] (107) stars up to giants with a hundred trillion[3][10] (1014) stars, all orbiting the galaxy's center of mass. Galaxies may contain many multiple star systems, star clusters, and various interstellar clouds. The Sun is one of the stars in the Milky Way galaxy; the Solar System includes the Earth and all the other objects that orbit the Sun.

Star clusters are not galaxies, they are inside galaxies. Globular clusters are spherical-shaped star clusters which are part of the outer halo of the Milky Way. One of the largest (and oldest) known star clusters, Messier 15, has several million stars, packed closely together, with a black hole at its centre. The stars are too closely packed to get an accurate count, but it certainly has more stars than some of the smaller galaxies.

Within galaxy clusters, galaxies move relative to other galaxies. They can and do collide. When this happens, the stars generally move past each other, but gas clouds and dust interact, and can form a burst of new stars. Gravity pulls both galaxies into somewhat new shapes, forming bars, rings or tail-like structures.




Many galaxies continue to form new generations of stars. The Milky Way, and all spiral shaped galaxies like it (see right side image of NGC 2997), produce new stars at a rate of one or two stars per year. This star formation happens in the vast interstellar clouds that account for about 1% to 10% of the mass of these galaxies. Globular star clusters, on the other hand, are not currently forming stars because this activity happened billions of years ago and then stopped once all of the gas and dust clouds were used up.

In the astronomical literature, the word 'Galaxy' with a capital G is used for our galaxy, the Milky Way. The billions of other galaxies are written as 'galaxy' with a lowercase g. The term Milky Way first came out in the English language in a poem by Chaucer.


Many galaxies continue to form new generations of stars. The Milky Way, and all spiral shaped galaxies like it (see right side image of NGC 2997), produce new stars at a rate of one or two stars per year. This star formation happens in the vast interstellar clouds that account for about 1% to 10% of the mass of these galaxies. Globular star clusters, on the other hand, are not currently forming stars because this activity happened billions of years ago and then stopped once all of the gas and dust clouds were used up.

In the astronomical literature, the word 'Galaxy' with a capital G is used for our galaxy, the Milky Way. The billions of other galaxies are written as 'galaxy' with a lowercase g. The term Milky Way first came out in the English language in a poem by Chaucer.



There are two main kinds of galaxies, spiral galaxy and elliptical galaxy. They are classified according to the Hubble Sequence

Urgain Dorjay
May 14, 2020
A huge system of gases, cloud, dust , star is termed as Galaxy or nebula

Sher Singh
Jun 26, 2020
A huge system of stars is called galaxy.

Rajesh Sharma
Aug 15, 2018
A galaxy is a huge system of billions of stars, and clouds of dust and gases.Millions of such galaxies make up the universe.

Tiya Jingar
May 24, 2020
Answer is c because a million number of stars,dust particles and clouds makes the galaxy and a billions of galaxys which makes our universe - milky way

Deepak Anand
May 18, 2020
It's usually assume that a group of stars is called galaxy.. Bcz galaxy means group that contain celestial object

A huge system of stars is called Galaxy

Abrar Shaikh
Nov 04, 2018
C is the right answer because all stars roam their that's why the right answer is c
it's a simple answer
if any doubts are there than tell me

Arun Kumar
Dec 16, 2018
A galaxy is a huge system of stars

Manpreet Kalra
May 16, 2020
It is a huge celestial body made up of extremely hot gases. Galaxy is a term that refer to billions of stars,cloud of dust and gases, and other celestial bodies considered as a single unit. The only bigger unit is the universe galaxies make up the universe.The galaxy we live in is called the Milky Way

Tejeshweeni Shep
Jan 15, 2020
Collection of universe(star,moon etc.) is called Gallaxy

Ashwini Koli
Jul 30, 2020
The correct answer is c.galaxy because the galaxy is the group of huge numbers of stars which we can't see from our eyes.

Pushpa Patil
Jul 24, 2019
The galaxy is the billion system of stars including gases,dust clouds.The millions of such galaxies are called universe

Neeraj!
Dec 01, 2020
HIGE SYSTEM OF STARS IS CALLED GALAXY

Jaya Gayathri
May 08, 2020
Galaxy is a large group of stars that are bounded by each others gravity in various shapes

Mithan Moith
May 04, 2020
The solar system has 8 planets

Akshit Gupta
Jan 15, 2020
Correct answer is option 'C'

Sharad Chavan
Jun 22, 2020
Huge System of stars is galaxy

Jayant
Apr 30, 2020
Lets understand the vast structure of universe with this.You are a dot (.) in earth. Earth is a dot in solar system. Solar system is dot in local interstellar neighbourhod. Local interstellar neighnorhod is dot in our milky way glaxy. Milky way galaxy is dot in local galatic group. Local galatic group is dot in virgo supercluster. Virgo supercluster is dot in local group of supercluster. Local group of supercluster is dot in observable universe.Now you find your answer.

Dhruvi Shah
Nov 29, 2020
Answer: (C) Just becoz group of stars forming various patterns is called a constellation. A huge system of stars is called a galaxy. The Moon is the closest celestial body to our Earth.

Kkk
Nov 05, 2018
Huge system of universe called Galax. We know star also there is universe so it's called galaxy. Hope u get ur answer

Akshita Vijay
Jul 20, 2020
A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.Milkyway also has a supermassive blackhole there.

Akash Akashsv
Jul 17, 2020
A galaxy is a huge collection of gas, dust and
billions of stars and thier solar system

A huge system of stars is called a galaxy. The Moon is the closest celestial body to our Earth.

Abi Saranya
Oct 25, 2020
A huge system of stars is called galaxy
A group of stars forming various patterns is called a
constellation. A huge system of stars is called a galaxy.

Sanjay Kumar
Jul 01, 2020
The huge group of stars is called galaxy

Hardik Kewat
Oct 07, 2020
Its answer is galaxy because galaxy is a huge system of stars.

Pawan Jha
Jun 04, 2020
Billions of stars and cloud and gases make a galaxy and millions galaxy make universe. So the huge system of stars is called galaxy.

Jaiswal Jaiswal
Jun 04, 2020
A galaxy is a huge collection of gas, dust and billions of stars and their solar system. A galaxy is held together by gravity.

Zakir Hussain
Aug 08, 2020
When stars get together because of their gravity is called galaxy

GALAXIES

A galaxy contains stars, gas, and dust which are held together as a group by gravity. There may be millions, or even billions, of stars in one galaxy. There are billions of galaxies in the universe.Galaxies are labeled according totheir shape. Some galaxies are called “spiral”, because they look like giant pinwheels in the sky. The galaxy we live in, the Milky Way, is a spiral galaxy. Some galaxies are called “elliptical”, because they look like flat balls. A galaxy may be called “irregular” if it doesn’t really have a shape. A new type of galaxy was discovered recently, called a “starburst” galaxy. In this type of galaxy, new stars just seem to ‘burst out’ very quickly

kushagra singh
Dec 13, 2020
Galaxy is a group cellestial bodies so, option c is correct

Radhe Singh
Jul 06, 2020
Because A huge system of stars ,gasses,dust and clouds is known as galaxy

Aman Verma
Jul 15, 2020
Group of stars are called Galaxy

Santosh Mishra
May 08, 2020
Galaxy is the huge system of star because it constitutes the all particles of matter just like gases,dust particles etc.

Reetika Bhatt
Dec 19, 2020
A group of millions and billions star that is called Galaxy. A huge group of stars which is called Galaxy.

Yogesh Kumar
Aug 09, 2020
Right answer is Galaxy

because a galaxy is huge system of billions of stars and clouds of dust and gases.
millions of such galaxies make the universe

A galaxy is a huge system of billions of stars, clouds, dusts, gases, etc.

Mariyala Rohith
Jul 20, 2020
Galaxy is known as the huge system of stars

Sara Jabeen
Oct 29, 2020
A group of stars forming various patterns is called a constellation. A huge system of stars is called a galaxy. The Moon is the closest celestial body to our Earth.

Avika Tomar
Jun 01, 2020
Because galaxy is the group of stars

Isha Soni
Nov 09, 2020
Because a galaxy contains many solar systems, which have their stars(like our own sun).

Jaspreet Kaur
Sep 25, 2020
Yes , it is galaxy but for a group of different patterns of stars it's called constellation

Bhavya Chauhan
May 02, 2020
I think galaxy is huge system of million of stars in galaxy there are stars, dust and clouds. Galaxies makes a universe

Aryan Gupta
Jul 04, 2020
galaxy
 is a 
huge
 collection of gas, dust, and billions of 
stars
and their solar 
systems
, all held together by gravity. We live on a planet 
called
 Earth that is part of our solar 
system
. ... A
galaxy
 is a 
huge
 collection of gas, dust, and billions of 
stars
and their solar 
systems
. A 
galaxy
 is held together by gravity.

Mun Wai
Dec 14, 2020
C) for me a huge system of start is called galaxy the correct answer

Shalini...
Dec 19, 2020
A huge system of stars is called a galaxy....

Aryan
Aug 12, 2020
Galaxy is called huge system of stars Example is Milky way or Akash ganga which consist of number of solar system ,dust particles,etc

The huge system of stars is called Galaxy.

Sunita Machhua
Sep 13, 2020
A huge systems of star is called galaxy.

Aparna Goldi
Aug 02, 2020
Moon is a natural satellite.Earth is a planet.Planet is a celestial body that revolves around the sun.

So the answer is 'Galaxy'.

Raiyan Zaib
Jun 04, 2020
A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet called Earth that is part of our solar system

Shaik Iqbal
Jun 24, 2020
Glaxcy option c is correct

Correct answer is option 'C'.

Yatendra Jaat
Apr 14, 2020
गैलेक्सी

Anupma Raj
Oct 14, 2020
A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems

Roopal Yadav
Jul 22, 2020
Billions of stars and the huge system of dust ,cloud ar formed galaxy

Shubham Nandi
Jun 25, 2020
Planets, celestial bodies , many huge asteroids many solar system creates a Galaxy .
and many galaxy make a universe

Sharukhan Kd
Nov 01, 2020
Galaxy's is group of huge star's

Ajit Khashap
Aug 20, 2020
The collection of stars is called galaxy and many galaxys are our brahmand