what is black hole ????
Answers
Answered by
0
Answer:
a region of space having a gravitational field so intense that no matter or radiation can escape.
Answered by
25
Intergalactic gas is so tenuous that it emits no light of its own. ... Instead astronomers study it indirectly by observing how it selectively absorbs the light coming from faraway sources known as quasars.
Similar questions