english: What Einstein did not realize was that, if you took our Sun and you crushed it down to six kilometers -- so you took a million times the mass of the Earth and you crushed it to six kilometers across, you would make a black hole, an object so dense that if light veered too close, it would never escape -- a dark shadow against the universe.
non_english: Čo si však Einstein neuvedomil bolo to, že keby ste vzali Slnko a stlačili by ste ho na objekt s priemerom šiestich kilometrov, teda vzali by ste miliónkrát objem Zeme a stlačili by ste ho do priemeru šiestich kilometrov, vytvorili by ste čiernu dieru, objekt taký hustý, že ak by svetlo skĺzlo príliš blízko, už by nikdy neuniklo, teda tmavý tieň na vesmírnom pozadí.