What is galaxy?

Answer 1

Where the planets live

Answer 2

Any of the billions of systems of stars and interstellar matter that make up the universe. Galaxies vary considerably in size, composition, structure, and activity, but nearly all are arranged in groups, or clusters, containing from a few galaxies to as many as 10,000. Each is composed of millions to trillions of stars; in many, as in the Milky Way Galaxy, nebulae can be detected. A large fraction of the bright galaxies in the sky are spiral galaxies, with a main disk in which spiral arms wind out from the centre. The arms contain the greatest concentration of a spiral galaxy's interstellar gas and dust, where stars can form. Surrounding the centre (nucleus) is a large, usually nearly spherical nuclear bulge. Outside this and the disk is a sparse, more or less spherical galactic halo. In elliptical galaxies, which vary greatly in size, stars are distributed symmetrically in a spherical or spheroidal shape. Dwarf ellipticals (with only a few million stars) are by far the most common kind of galaxy, though none is conspicuous in the sky. Irregular galaxies, such as the Magellanic Clouds, are relatively rare. Radio galaxies are very strong sources of radio waves. Seyfert galaxies, with extremely bright nuclei, often emit radio waves and may be related to quasars.

Answer 3

A galaxy is a large collection of stars that collectively form a gravitational entity.

Wel like to say "stars" because you can see the stars of a galaxy, but in fact stars are only a part of the galaxy and in fact not even the biggest part. A galazy also consists of 'dark matter' (stuff we cant see but is two thirds of the mass of the galaxy) dust and debris clouds, and black holes.

Our galaxy, the Milky Way, the one to which we belong as a part, contains The Sun and all its little planets, including Earth and us upon it.

Answer 4

A galaxy is a massive, gravitationally bound system that consists of stars, an interstellar medium of gas and dust, and an unknown dark matter. Typical galaxies contain ten million to one trillion (10^7 to 10^12) stars, all orbiting a common center of gravity.

Answer 5

A galaxy is a massive, gravitationally bound system that consists of stars, an interstellar medium of gas and dust, and an unknown dark matter. Typical galaxies contain ten million to one trillion (10^7 to 10^12) stars, all orbiting a common center of gravity.

Answer 6

A galaxy is made up of billions or trillions of stars bound together by their own gravity. All of the stars we see in our night sky belong to our own Milky Way galaxy.

Answer 7

One huge Unit....

It has a center.....

It travells so fast into outer space....

There are billions and billions of it ....with different shapes & Sizes...

Inside it there are Billions & Billions of Stars, Planets, Solar Systems like ours....which is called the Milky way.....

Distance within galaxies cannot be measured but with light speed

I love galaxies...

Answer 8

A huge group of any where from a few billion to a few hundred billion stars. Our galaxy has about a hundred billion.

Answer 9

galaxy is a collection of asteroids, gases, planets and few stars. it is bunch of all it.


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Answer 10

It's collection of stars, revolving around denser core of stars.