(astronomy) an
object (also known as black hole) so massive that nothing, not even light, can escape its gravitation. Black holes were
given their name because they absorb all the light that falls on them. The
existence of black holes was first predicted by the
general theory of relativity, which
states that gravity increases in proportion to
mass and
mass increases in proportion to density. Black holes are
thought to arise from the
death of very massive
stars.