GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A galaxy is a large collection of stars, gas and dust. What is responsible for holding the stars, gas, and dust together in a galaxy?
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heat
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light
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gravity
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friction
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Explanation:
Detailed explanation-1: -A galaxy is a giant, spinning object made of gas, dust, and stars held together by gravity.
Detailed explanation-2: -A huge collections of stars, dust and gas are known as galaxies. They contain several million of stars and their size can range from few thousands to several hundred thousands light years.
Detailed explanation-3: -A star is a sphere of gas held together by its own gravity. The closest star to Earth is our very own Sun, so we have an example nearby that astronomers can study in detail. The lessons we learn about the Sun can be applied to other stars. A star’s life is a constant struggle against the force of gravity.
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