Question
Download Solution PDFDirection : Choose the correct alternative for of the following.
Which of the following is not a planet?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is 'More than one of the above'.
Key Points
- A planet is generally defined as a celestial body that orbits around a star (the sun in the case of our solar system), is spherical in shape, and has cleared its orbit of other debris.
- Mercury is a planet. It's the smallest planet and closest to the sun in our solar system.
- Pluto, once considered the ninth planet of our solar system, was demoted to a dwarf planet status in 2006.
- The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Therefore, in the current classification, it is not considered a full-fledged planet.
- The Moon is not a planet. It's a satellite, specifically the Earth's only natural satellite.
Therefore, the correct answer is Option 4.
Last updated on May 25, 2025
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