The perfect nightmare might be the black hole. Nothing can escape from
the proximity of a black hole, not even electromagnetic radiation can escape
its wrath. The horizon, a spherical boundary, surrounds the entire black
hole. The reason this is called a black hole is because it even sucks in
light without allowing it to escape, and the absence of light is black. The
concept of a black hole was formed from Einstein's theory of relativity and
developed by and astronomer from Germany named Karl Schwarzschild in 1916.
Black holes form from exhausted stars. When nuclear fuels are exhausted
in its core, there is no more heat to resist the core's contraction. If the
core goes beyond 1.7 solar masses, neutron pressure or electron pressure
cannot prevent collapse to a black hole. These two kinds of pressure can
form a white dwarf or a neutron star.
A black hole weighing a few thousand million metric tons or more may
remain in space. It's hard to get rid of a black hole. Try not to get stuck