Question

What is Galaxy.....?​

Answer 1

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A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. ... This is the picture taken by the Hubble Space Telescope showing thousands of galaxies.

Answer 2

ANSWER :-

A galaxy is a huge collection of gas, dust, and billions of stars , interstellar gas , dark matter all held together by gravity.

There are three types of galaxies:-

• Spiral Galaxies :- They have a bulge in centre of old stars surrounded by disk of young stars arranged in spiral forms.
• Elliptical Galaxies :- These are flattened balls of old stars and contain little gas.
• Irregular Galaxies :- They don't have any particular shape.