GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What statement describes galaxies?
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They are similar in size to our solar system.
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They contain one star and thousands of planets.
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They are spherical in shape and usually smaller than our solar system.
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They contain billions of stars and are significantly larger than our solar system.
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Explanation:
Detailed explanation-1: -The length of the solar system is many magnitudes smaller than the length of a galaxy. A solar system contains one star around which planets orbit, where as a galaxy can contain from a 100 million to over a trillion stars.
Detailed explanation-2: -The universe’s largest-known galaxies-giant elliptical galaxies-can contain up to a trillion stars and span two million light-years across. Elliptical galaxies may also be small, in which case they are called dwarf elliptical galaxies.
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