Chapter 15, Part 2: Black Holes

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Chapter 15, Part 2Black Holes
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Stellar-Mass Black Hole Death of a Massive Star
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Supermassive Black Holes In the Centers of most
Galaxies
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What are Quasars?
Active Galaxies
Quasars get their energy from swallowing up
matter in the accretion disk
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Quasars look like a star, but must be
enormously luminous because it is 4 billion
light years away!!
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Primordial or mini-black holes may have formed
in the early universe
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Intermediate -Mass black holes In the Centers of
Globular Clusters
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The Geometry of a Black Hole
Nothing can escape the gravity of a black hole
once it is within the event horizon, not even
light!!!
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Black holes are predicted by Einsteins General
Theory of Relativity (1916) Anything that has
mass curves the space around it!
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Gravitational Waves Discovered by LIGO (2016)
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Detecting Black Holes
Black holes can only be seen when it is feeding!
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Detecting Black Holes
Matter orbiting around a black hole produces
strong X-ray radiation!
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Detecting Black Holes Monitoring Speeds of Stars
at the Galactic Center
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Black holes evaporate Hawking Radiation
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Wormholes
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Tidal forces near a black hole would stretch and
tear the object apart!