Answer:

BLACKHOLE

Answer	Crossword Clue
BLACKHOLE	"The .. of Calcutta"
BLACKHOLE	"The .... of Calcutta"
BLACKHOLE	Gravitational collapse consequence, in theory

BLACKHOLE	There's no escaping it
BLACKHOLE	Term popularized by physicist John Wheeler
BLACKHOLE	Outer-space omnivore
BLACKHOLE	An ergosphere surrounds it
BLACKHOLE	Dungeon.
BLACKHOLE	Calcutta dungeon
BLACKHOLE	Place in space
BLACKHOLE	Dark spot in outer space

BLACKHOLE	Very attractive body?
BLACKHOLE	Giant sucker?
BLACKHOLE	Nothing can escape from one
BLACKHOLE	There's no escaping this
BLACKHOLE	Escape-proof gravitational field
BLACKHOLE	Hawking's astronomical body
BLACKHOLE	Astronomical body
BLACKHOLE	Outer space phenomenon photographed for the first time in 2019