UNIVERSE
SOLAR STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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mile
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light-year
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light-second
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kilometer
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Detailed explanation-1: -In astronomy, scientists use light-years as a unit of measurement.
Detailed explanation-2: -There are 9, 900, 000 light years on average between galaxies.
Detailed explanation-3: -Now that you know how far a light year is, consider the fact that the diameter of our Solar System is approximately Page 2 7, 440, 000, 000 miles, 80 AU, or about . 00127 light years.
Detailed explanation-4: -Our Sun is one of at least 100 billion stars in the Milky Way, a spiral galaxy about 100, 000 light-years across.
Detailed explanation-5: -Our planetary system is called “the solar system” because we use the word “solar” to describe things related to our star, after the Latin word for Sun, “solis.” Our planetary system is located in an outer spiral arm of the Milky Way galaxy.
Detailed explanation-6: -Galileo’s discoveries about the Moon, Jupiter’s moons, Venus, and sunspots supported the idea that the Sun-not the Earth-was the center of the Universe, as was commonly believed at the time.