Black holes and worm holes

A while ago I promised someone that I would explain him what are black holes. By the time it was night, we were both too tired and it was too hard to explain something like. But now I have found the cutest drawings of a black hole and a worm hole (from an astronomy book but I cannot remember its name). Unfortunately the texts are in Finnish but I like the drawings as much as the subject so maybe it's ok.

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