So, if I were to compress the Earth down to the size of a sugar cube, it would become a black hole, because the size of a sugar cube is its Schwarzschild radius.
Pokud bychom zhustili celou Zemi na velikost kostky cukru, stala by se z ní černá díra, protože velikost kostky cukru odpovídá jejímu Schwarzschildovu poloměru.