Question

where those things goes which get inn the BLACK HOLE

Answer 1

Although the singularity inside the black hole is infinitely small the black hole would appear to be the size of its event horizon, and to all effects is. When matter falls into the event horizon it becomes isolated from the rest of space and time and has, effectively, disappeared from the universe that we exist in.

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Answer 2

space that are so dense they create deep gravity sinks. Beyond a certain region, not even light can escape the powerful tug of a black hole's gravity. And anything that ventures too close—be it star, planet, or spacecraft—will be stretched and compressed like putty in a theoretical process aptly known as spaghettification.