A Black Hole sucking light with its gravity
A black hole is a concentration of mass whose gravitational field is so strong that no mass or light can escape it.
Black holes form when a star more than ten times the size of the Sun explodes or a giant clump of mass comes together and forms to a black hole. Black holes are predicted by general relativity. Under the description provided by general relativity, as an object moves closer to a black hole, the energy required for it to escape continues to increase until it becomes infinite at the event horizon, the surface beyond which escape is impossible. Inside the event horizon. At the center of a black hole is the singularity, a point of zero size and infinite density. The geometry of space-time is distorted in a way that makes moving closer to the central singularity inevitable no matter how the infalling object moves.
According to recent advancements in astronomy, however, black holes internal geometry are exponentially more chaotic than previously predicted by the Schwartzshield equation of stagnant black holes. All black holes have some quantity of rotational speed, as do all celestial bodies. However to a point singularity, this would be impossible due to the fundamental nature of zero dimensional particles. Thus, the Ringularity is introduced, alongside a plethora of other features not present in a static black hole. Due to the intense gravitational pull of the black hole, as it rotates it pulls spacetime alongside it in a process known as frame dragging. This region is known as the ergosphere, and it is the fundamental point of influence. Any matter caught within the ergosphere would begin orbiting the black hole at intensive rates, eventually reaching light speed; this process forms what is known as an accretion disk. External to the event horizon is that of the photon disk, a region by which photons can neither enter the black hole nor exit it's gravitational pull. Technically this would allow you to see the back of your head if in close proximity to the event horizon. The event horizon is a region by which not even light can escape the intense gravity created by the ringularity. Theoretically there should be a second barrier beyond the event horizon known as the cauchy horizon, this would be the exact moment by which the curvature of spacetime is infinite. Fascinatingly it should be possible for another photon disk to occur at this region if oriented perfectly. In the centre of it all is a two dimensional ringularity of infinite density. Much like a singularity most matter would succumb to the gravity and fall into the core.
The existence of black holes in the universe is well supported by astronomical observation, particularly from studying X-ray emission from X-ray binaries and active galactic nuclei. It has been hypothesised that black holes radiate energy due to quantum mechanical effects known as Hawking radiation. The source of a black hole's immense gravity is the fact that it is extremely massive, yet infinitely small giving it an extremely high density. Stellar-mass black holes are the most common black holes in the universe. Wormholes are ways to time travel and travel faster than light
It is theorized that black holes may connect to form a wormhole. If this would happen a black hole would connect to another extremely far away causing a quantum time disperstion effect allowing any spacecraft or matter to theoretically pass through it.