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+Ton 618 is a distant, intensely luminous [quasar](/wiki/quasar) in the constellation Canes Venatici. It harbors an ultramassive [black hole](/wiki/black_hole), among the largest ever discovered, whose immense gravity profoundly shapes its galactic core.
+## See also
+- [Active Galaxy](/wiki/active_galaxy)
+- [Event Horizon](/wiki/event_horizon)
+- [Cosmology](/wiki/cosmology)