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Which of the following is/ are correct about the dwarf planets?
1. A dwarf planet is a planetary-mass object that is neither a planet nor a satellite.
2. A dwarf planet is a celestial body in direct orbit of the Sun that is massive enough for its shape to be controlled by gravitation, but that unlike a planet has not cleared its orbital region of other objects.
3. Dwarf planets are any astronomical objects orbiting the Sun that did not show the disk of a planet and were not observed to have the characteristics of an active comet.
4. Dwarf planets are formed out of cosmic dust grains that collide and stick to form larger and larger bodies.
  • a)
    1, 2 and 3
  • b)
    2 and 3
  • c)
    2, 3 and 4
  • d)
    1 and 2
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Which of the following is/ are correct about the dwarf planets?1. A dw...
A dwarf planet is a planetary-mass object that is neither a planet nor a satellite. More explicitly, the International Astronomical Union (IAU) defines a dwarf planet as a celestial body in direct orbit of the Sun that is massive enough for its shape to be controlled by gravitation, but that unlike a planet has not cleared its orbital region of other objects.The point 3 refers to asteroids.
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Which of the following is/ are correct about the dwarf planets?1. A dw...
Dwarf planets are celestial bodies that share some characteristics with planets but do not meet the criteria to be classified as full-fledged planets. The correct statements about dwarf planets are:

1. A dwarf planet is a planetary-mass object that is neither a planet nor a satellite.
2. A dwarf planet is a celestial body in direct orbit of the Sun that is massive enough for its shape to be controlled by gravitation, but that unlike a planet has not cleared its orbital region of other objects.

Explanation:

1. A dwarf planet is a planetary-mass object that is neither a planet nor a satellite.

- This statement is correct. Dwarf planets are objects in space that have enough mass to be rounded by their own gravity but are not considered planets or satellites. They fall into a category between planets and small Solar System bodies.

2. A dwarf planet is a celestial body in direct orbit of the Sun that is massive enough for its shape to be controlled by gravitation, but that unlike a planet has not cleared its orbital region of other objects.

- This statement is also correct. One of the main differences between a planet and a dwarf planet is the ability to clear its orbital region. Planets have cleared their orbits of other debris, while dwarf planets have not. Instead, they share their orbital region with other objects, such as asteroids or other dwarf planets.

3. Dwarf planets are any astronomical objects orbiting the Sun that did not show the disk of a planet and were not observed to have the characteristics of an active comet.

- This statement is incorrect. While it is true that dwarf planets do not exhibit the characteristics of active comets, this statement does not fully encompass the definition of a dwarf planet. The key characteristic of a dwarf planet is its inability to clear its orbital region, as mentioned in statement 2.

4. Dwarf planets are formed out of cosmic dust grains that collide and stick to form larger and larger bodies.

- This statement is incorrect. Dwarf planets, like planets, are formed through a process called accretion. They are formed from the accumulation of smaller objects, such as asteroids and comets, rather than cosmic dust grains colliding and sticking together.

Therefore, the correct statements about dwarf planets are 1 and 2, making option D the correct answer.
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Which of the following is/ are correct about the dwarf planets?1. A dwarf planet is a planetary-mass object that is neither a planet nor a satellite.2. A dwarf planet is a celestial body in direct orbit of the Sun that is massive enough for its shape to be controlled by gravitation, but that unlike a planet has not cleared its orbital region of other objects.3. Dwarf planets are any astronomical objects orbiting the Sun that did not show the disk of a planet and were not observed to have the characteristics of an active comet.4. Dwarf planets are formed out of cosmic dust grains that collide and stick to form larger and larger bodies.a)1, 2 and 3b)2 and 3c)2, 3 and 4d)1 and 2Correct answer is option 'D'. Can you explain this answer?
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Which of the following is/ are correct about the dwarf planets?1. A dwarf planet is a planetary-mass object that is neither a planet nor a satellite.2. A dwarf planet is a celestial body in direct orbit of the Sun that is massive enough for its shape to be controlled by gravitation, but that unlike a planet has not cleared its orbital region of other objects.3. Dwarf planets are any astronomical objects orbiting the Sun that did not show the disk of a planet and were not observed to have the characteristics of an active comet.4. Dwarf planets are formed out of cosmic dust grains that collide and stick to form larger and larger bodies.a)1, 2 and 3b)2 and 3c)2, 3 and 4d)1 and 2Correct answer is option 'D'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following is/ are correct about the dwarf planets?1. A dwarf planet is a planetary-mass object that is neither a planet nor a satellite.2. A dwarf planet is a celestial body in direct orbit of the Sun that is massive enough for its shape to be controlled by gravitation, but that unlike a planet has not cleared its orbital region of other objects.3. Dwarf planets are any astronomical objects orbiting the Sun that did not show the disk of a planet and were not observed to have the characteristics of an active comet.4. Dwarf planets are formed out of cosmic dust grains that collide and stick to form larger and larger bodies.a)1, 2 and 3b)2 and 3c)2, 3 and 4d)1 and 2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is/ are correct about the dwarf planets?1. A dwarf planet is a planetary-mass object that is neither a planet nor a satellite.2. A dwarf planet is a celestial body in direct orbit of the Sun that is massive enough for its shape to be controlled by gravitation, but that unlike a planet has not cleared its orbital region of other objects.3. Dwarf planets are any astronomical objects orbiting the Sun that did not show the disk of a planet and were not observed to have the characteristics of an active comet.4. Dwarf planets are formed out of cosmic dust grains that collide and stick to form larger and larger bodies.a)1, 2 and 3b)2 and 3c)2, 3 and 4d)1 and 2Correct answer is option 'D'. Can you explain this answer?.
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