Class 3 Exam > Class 3 Questions > Which of these is now not counted as a planet...
Start Learning for Free
Which of these is now not counted as a planet?
- a)Saturn
- b)Uranus
- c)Neptune
- d)Pluto
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptun...
Earlier Pluto was counted as the ninth planet in the Solar system. But now it is counted as a dwarf planet.
Free Test
FREE
| Start Free Test |
Community Answer
Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptun...
Understanding the Status of Pluto
Pluto was once considered the ninth planet in our solar system. However, in 2006, it was reclassified as a "dwarf planet." This change was made by the International Astronomical Union (IAU) and is based on specific criteria that define what constitutes a planet.
Criteria for Planets
To be classified as a planet, a celestial body must meet three criteria:
- Orbits the Sun: The object must revolve around the Sun.
- Sufficient Mass: It must have enough mass for its gravity to shape it into a nearly round form.
- Cleared its Orbit: The object must have cleared its orbit of other debris.
Why Pluto Doesn't Qualify
Pluto meets the first two criteria but fails the third:
- Orbits the Sun: Pluto does revolve around the Sun.
- Sufficient Mass: It is massive enough to maintain a round shape.
- Failed to Clear Orbit: Pluto shares its orbital zone with other objects in the Kuiper Belt, which makes it unable to meet the clearing criterion.
Conclusion
Due to these reasons, Pluto is categorized as a dwarf planet rather than a full-fledged planet. The reclassification reflects our evolving understanding of celestial bodies in our solar system. Therefore, among the options given, Pluto is the only one that is no longer counted as a planet.
Pluto was once considered the ninth planet in our solar system. However, in 2006, it was reclassified as a "dwarf planet." This change was made by the International Astronomical Union (IAU) and is based on specific criteria that define what constitutes a planet.
Criteria for Planets
To be classified as a planet, a celestial body must meet three criteria:
- Orbits the Sun: The object must revolve around the Sun.
- Sufficient Mass: It must have enough mass for its gravity to shape it into a nearly round form.
- Cleared its Orbit: The object must have cleared its orbit of other debris.
Why Pluto Doesn't Qualify
Pluto meets the first two criteria but fails the third:
- Orbits the Sun: Pluto does revolve around the Sun.
- Sufficient Mass: It is massive enough to maintain a round shape.
- Failed to Clear Orbit: Pluto shares its orbital zone with other objects in the Kuiper Belt, which makes it unable to meet the clearing criterion.
Conclusion
Due to these reasons, Pluto is categorized as a dwarf planet rather than a full-fledged planet. The reclassification reflects our evolving understanding of celestial bodies in our solar system. Therefore, among the options given, Pluto is the only one that is no longer counted as a planet.
Attention Class 3 Students!
To make sure you are not studying endlessly, EduRev has designed Class 3 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 3.
|
Explore Courses for Class 3 exam
|
|
Similar Class 3 Doubts
Top Courses for Class 3View all
Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer?
Question Description
Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer? for Class 3 2024 is part of Class 3 preparation. The Question and answers have been prepared according to the Class 3 exam syllabus. Information about Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 3 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer?.
Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer? for Class 3 2024 is part of Class 3 preparation. The Question and answers have been prepared according to the Class 3 exam syllabus. Information about Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 3 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 3.
Download more important topics, notes, lectures and mock test series for Class 3 Exam by signing up for free.
Here you can find the meaning of Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of these is now not counted as a planet?a)Saturnb)Uranusc)Neptuned)PlutoCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 3 tests.
|
|
Explore Courses for Class 3 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup