• After a supernova explosion, the star's core is left over.
  • This material is extremely dense.
  • What happens next depends on the core's mass.
  • A neutron star is made almost entirely of neutrons.
  • A black hole isn't a hole at all.
  • It is the tremendously dense core of a supermassive star.
  • Black holes are unimaginably dense.
  • Not even light can escape their gravity (Figure below)!
  • This is why they are black.
  • We can't see black holes.
  • Use the resources below to answer the questions that follow.
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