GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Planets look bigger than stars.
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Planets are more difficult to see than stars.
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There are not enough planets to form a constellation.
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Planets do not maintain fixed positions relative to other planets or stars.
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Detailed explanation-1: -Although many ancient civilizations designated certain patterns of stars as constellations, they never included planets in their constellations. What feature of planets, as opposed to stars, explains this? They do not maintain fixed positions relative to other planets or stars.
Detailed explanation-2: -Ancient sailors used stars and constellations to guide their travels. Polynesians, for example, sailed among the Pacific Ocean islands by watching stars. To explain why planets seemed to change direction, Ptolemy used old calculations by Hipparchus to understand planetary motion.
Detailed explanation-3: -The stars seem so fixed that ancient sky-gazers mentally connected the stars into figures (constellations) that we can still make out today. But in reality, the stars are constantly moving. They are just so far away that the naked eye cannot detect their movement.
Detailed explanation-4: -Knowing the sky and the position of the stars in the past was very important for life, as they used the sky in navigation as location points and in agriculture to understand the changes of the seasons.