Calcutta dungeon |
Astronomical body |
Inescapable place |
Dark spot in space |
Coal mine, perhaps? |
Very attractive body? |
There's no escaping it |
Dark spot in outer space |
There's no escaping this |
Hawking's astronomical body |
Result of a star's collapse |
Subject for Stephen Hawking |
Nothing can escape from one |
Escape-proof gravitational field |
Term popularized by physicist John Wheeler |
Gravitational collapse consequence, in theory |