Black holes do indeed have a central singularity of infinite density and zero volume where all mass in concentrated; however, the term "solid" describes a state of matter which definition may defy the unclearly described and poorly understood state of matter in the singularity.
Despite the apt metaphor of being a "hole" into which matter and energy can disappear never to return, black holes are not strictly speaking a hole in the common sense; in fact, it might be better described as an unusual region of spacetime answering to infinite spatial or temporal curvature as described by Einstein's General Relativity than it would either as a hole or as a material object.
Neither. A black hole has crushed itself to an infinity dense point. It cannot be considered any state of matter that we are familiar with.
At the center of a black hole is a mass that has collapsed to an infinitely dense point.
Dense grade: Means after graded, the material will form solid without hole. Open grade: means the solid will have over 15% holes.
There is no "behind" a black hole. A black hole is not a circular disk. The event horizon is spherical, with a singularity at the center. That singularity is an infinitely dense point.
A black hole
Neither. A black hole has crushed itself to an infinity dense point. It cannot be considered any state of matter that we are familiar with.
A black hole is more dense. In principle, the black hole exists all at one point. So its volume is zero, and its density is infinite.
At the center of a black hole is a mass that has collapsed to an infinitely dense point.
Otherwise known as a Black Hole
Dense grade: Means after graded, the material will form solid without hole. Open grade: means the solid will have over 15% holes.
The singularity at the centre of a black hole.
there is no such thing as that
There is no "behind" a black hole. A black hole is not a circular disk. The event horizon is spherical, with a singularity at the center. That singularity is an infinitely dense point.
A black hole
A black hole isn't a hole as such. It is an extremely dense dead star that attracts all matter into a tiny singularity that has a massive density.
really really dense material that comes from a supernova explosion
no. it is black because black holes are so dense that light can't even escape from them. therefore making them black.