What is a Galaxy ? please help me
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A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. ... A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity.
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EXPLANATION:
A GALAXY IS A HUGE COLLECTION OF GAS,DUST AND BILLIONS OF STARS AND THEIR SOLAR SYSTEMS AND HELD TOGETHER BY GRAVITY.IN A GALAXY THE CELESTIAL BODIES REVOLVE AROUND A CENTRAL OBJECT.
THERE ARE FOUR KINDS OF GALAXIES SPIRAL GALAXIES, LENTICULAR GALAXIES, ELLIPTICAL GALAXIES AND IRREGULAR GALAXIES.
OUR MILKY WAY GALAXIES IS ONE OF THESE TYPES WHICH IS SPIRAL GALAXY.
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