The International Astronomical Union (IAU) considers an object to be a dwarf planet if:

  1. It orbits a star
  2. It has enough mass for its gravity to overcome external forces to acquire a near-spherical shape
  3. It doesn’t have bigger objects in its neighbourhood

Select the correct option from the codes given below:

[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3

1 thought on “The International Astronomical Union (IAU) considers an object to be a dwarf planet if:”

  1. A [ Only 1 & 2]
    Notes:
    (1) A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighborhood around its orbit. (2) A “dwarf planet” is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, (c) has not cleared the neighborhood around its orbit, and (d) is not a satellite. (3) All other objects, except satellites, orbiting the Sun shall be referred to collectively as “Small Solar System Bodies.”

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