GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a particle of debris in the solar system that does not act as a satellite of any planet.
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a visible body of liquid or frozen crystal droplets suspended above a planetary surface
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a massive system of stars, gas, dust and dark matter bound together by gravity.
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the visible path of a meteoroid as it enters Earth’s atmosphere.
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Detailed explanation-1: -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.
Detailed explanation-2: -A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek galaxias (), literally ‘milky’, a reference to the Milky Way galaxy that contains the Solar System.
Detailed explanation-3: -Our galaxy, the Milky Way, is typical: it has hundreds of billions of stars, enough gas and dust to make billions more stars, and at least ten times as much dark matter as all the stars and gas put together. And it’s all held together by gravity.