Black holes contain a singularity at their center.

Black holes are regions in space where an enormous amount of mass is packed into a tiny volume. This creates a gravitational pull so strong that not even light can escape. They are formed when giant stars collapse and possibly through other methods that are still unknown.
While an explosion of a man-made bomb expands through the air, the Big Bang did not expand through anything. That’s because there was no space to expand through at the beginning of time. Rather, physicists believe that the Big Bang created and expanded space itself, thereby stretching the universe.
A black hole is an astronomical object with a gravitational pull so strong that nothing, not even light, can elude it. A black hole’s “surface,” called its event horizon, defines the boundary where the velocity needed to escape exceeds the speed of light, which is the speed limit of the cosmos.
The Big Bang singularity represents the beginning of space and time in our universe, and the black hole singularity represents the end of space and time in our universe. If we could time travel past negative infinity, I believe we would be in a black hole of another universe.
A black hole and the expanding universe, stemming from the Big Bang, are different concepts in their relationship to time and space. A black hole is a region of spacetime with extreme gravity, while the Big Bang describes the origin and expansion of the entire universe. The Big Bang’s singularity marks the beginning of space and time, whereas a black hole’s singularity is a point of infinite density within spacetime. The expanding universe is characterized by the stretching of space, while black holes warp and distort spacetime around them.
Near a black hole, the slowing of time is extreme. From the viewpoint of an observer outside the black hole, time stops. For example, an object falling into the hole would appear frozen in time at the edge of the hole. Inside a black hole is where the real mystery lies.

Big Bang: Origin: The Big Bang theory posits that the universe originated from a hot, dense state and has been expanding ever since.

Singularity: The Big Bang began with a singularity, a point of infinite density and temperature, marking the beginning of space and time.

Expansion: The universe is expanding, meaning the distance between galaxies is increasing all the time.

Time: The Big Bang singularity represents the beginning of time in our universe.

Black Hole Formation: Black holes form when massive stars collapse under their own gravity, creating a region where gravity is so strong that nothing, not even light, can escape.

Singularity: Black holes contain a singularity at their center, a point of infinite density.

Event Horizon: The event horizon is the boundary around a black hole where the escape velocity exceeds the speed of light, acting as a point of no return.

Spacetime Distortion: Black holes warp and distort spacetime around them, causing time to slow down near the black hole as perceived by an outside observer.

Time: While time slows down near a black hole’s event horizon from an external perspective, an object falling into a black hole would not experience time stopping.

Key Differences: Scale: The Big Bang describes the origin and expansion of the entire universe, while black holes are localized objects within that universe.

Nature of Singularity: The Big Bang singularity represents the beginning of space and time, while a black hole’s singularity is a point of infinite density within existing spacetime.
Effect on Time: The Big Bang singularity marks the beginning of time, while black holes cause time dilation (slowing down) near their event horizon.

Expansion: The Big Bang involves the expansion of space itself, while black holes warp and distort spacetime around them but do not cause overall expansion of the universe.

Black holes contain a singularity at their center.

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