Why Isn't a Collapsed Star a Black Ball?

[menniandscience]

if a star collapses in its all sides simultaneously, why it become a flat disk later? (as if it crunches to the equator)


and also, if some can say if there are not solar system but planet system? possible massive planet in the center of planets revolving?

thank you

 

[tiny-tim]

Hi meni ohana!

if a star collapses in its all sides simultaneously, why it become a flat disk later? (as if it crunches to the equator)

It doesn't …

it collapses spherically symmetrically, to a point singularity.

If it is rotating, then the point singularity is a ring instead of a point, but it is never a disc.

 

[menniandscience]

so what about the energy burst jet, it is not revolving, and it is supposed to come out of the center of that ring, but at the center there is nothing, is it make sense?
thanks

 

[tiny-tim]

No, it doesn't get anywhere near the centre, it comes from well outside an ordinary surface or an ordinary event horizon.

 

[menniandscience]

so ill go abit harder :) why the event horizon is disk and not ball-shaped (even though the rotation of the singularity is flat)? or maybe it is...

 

[tiny-tim]

No, the event horizon is always a sphere (ball-shaped).

 

[menniandscience]

thanks, good to know all this