Gravity Collapse on Planets: Physicists' Perspective

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Gravity collapse primarily occurs in stars due to their significant mass and the processes like nuclear fusion that counteract gravitational forces. Planets, having much smaller mass, do not experience gravitational collapse in the same way because they lack the necessary conditions for such a phenomenon. The minimum mass required for a star to undergo gravitational collapse and potentially form a black hole is estimated to be between 20 to 40 solar masses. This stark difference in mass explains why discussions about gravitational collapse predominantly focus on stars rather than planets. Understanding these dynamics highlights the unique processes governing stellar evolution compared to planetary formation.
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Why does physicist only talk about gravity collpase on stars?

Doesn't gravity collapse happen to planets? I mean they do not have any process such as nuclear fusion do repell gravity.
 
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I would imagine the mass of planets is much too small. After all, gravity is a very weak force.
 
Tail is correct, the mass of a planet is far, far too small for gravitational collapse to occur IIRC the minimum mass of a star (befiore going supernova) needed to create a black hole is thought to be in the region of 20-40 solar masses (i.e. 20-40 times the mass of our sun).
 

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