GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Venus
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Pluto
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Jupiter
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Mars
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Detailed explanation-1: -In August 2006 the International Astronomical Union (IAU ) downgraded the status of Pluto to that of “dwarf planet.” This means that from now on only the rocky worlds of the inner Solar System and the gas giants of the outer system will be designated as planets.
Detailed explanation-2: -Pluto is not a planet because a planet must: orbit the Sun; have sufficient mass to be round; not be a moon of another object; have removed small objects from the area around its orbit. In 2006 the IAS declared that Pluto had not cleared the area around its orbit, so it was reclassified as a dwarf planet.
Detailed explanation-3: -Pluto is now classified as a dwarf planet because, while it is large enough to have become spherical, it is not big enough to exert its orbital dominance and clear the neighborhood surrounding its orbit.