GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What components best define a galaxy?
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gas, dust, and billions of stars
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meteors, comets, and asteroids
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planets, moons, and a single star
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ice, rock, and dust
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Explanation:
Detailed explanation-1: -The Short Answer: A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.
Detailed explanation-2: -Spiral galaxies appear as flat, blue-white disks of stars, gas and dust with yellowish bulges in their centers. These galaxies are divided into two groups: normal spirals and barred spirals.
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.
There is 1 question to complete.