From: mk_thisisit
Robert Oppenheimer, a renowned physicist, contributed to the understanding of black holes with an article detailing a theoretical process for their formation [08:20:00].
Dust Collapse
Oppenheimer’s theory is based on the concept of “dust collapse” [08:26:00]. In this model, “dust” refers to material without pressure, meaning nothing will stop the collapse process once it begins [08:39:00]. This collapse is depicted as exactly spherically symmetrical, like a ball, with everything falling towards the center [08:44:00].
Formation of a Singularity
As particles fall towards the center without being stopped by pressure, they create what is known as a singularity [08:57:00]. This singularity is characterized by infinite density [09:03:00]. This “image” of Oppenheimer and Snyder (referring to his collaborator) describes matter collapsing into what is now called a black hole [09:08:00].
Trap Surface
Oppenheimer also defined the concept of a “trap surface” [09:13:00]. This inward-collapsing surface, even if irregular, possesses a specific criterion [09:18:00]. If this criterion is met, mathematical principles demonstrate that the formation of a singularity becomes unavoidable [09:29:00].
Cosmic Censor Hypothesis
The concept of singularities within black holes is linked to the “cosmic censor hypothesis” [13:53:00]. This hypothesis suggests that all singularities must be hidden inside the event horizon [13:56:00]. Essentially, a “cosmic censor” prevents insight into the true nature of singularities [14:08:00]. However, whether a horizon must always surround a singularity remains an open and mathematically challenging problem [14:15:00].
If black holes are fully understood, it would represent a significant advancement in theoretical physics [14:34:00].