Ranked #1
Discovery of Active Galaxies
Discovery of Active Galaxies
Transcript: Active galaxies were discovered even before we knew the distance to galaxies. In 1908, Edward Fath discover... Read more
28 Jul 2011
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Ranked #2
Synchrotron Radiation
Synchrotron Radiation
Transcript: Synchrotron radiation is radiation caused when particles, usually electrons, are accelerated in the presence... Read more
28 Jul 2011
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Radio Galaxies
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Transcript: About one percent of all galaxies and ten percent of all active galaxies have high levels of radio emission.... Read more
28 Jul 2011
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Ranked #4
Emission from Accretion Disks
Emission from Accretion Disks
Transcript: An accretion disk is a hallmark of an active galactic nucleus. Supermassive black holes accrete gas from th... Read more
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Inverse Compton Radiation
Inverse Compton Radiation
Transcript: Inverse Compton radiation can occur in an active galactic nucleus when the energy density is very high, as c... Read more
28 Jul 2011
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Ranked #6
Nonthermal Radiation
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Transcript: All atoms or molecules are in constant motion or vibration. The emission or radiation that results is calle... Read more
28 Jul 2011
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Ranked #7
Radio Galaxy Morphology
Radio Galaxy Morphology
Transcript: Hundreds of radio galaxies have been found, studied, and identified using synthesis radio telescopes like th... Read more
28 Jul 2011
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Ranked #8
Seyfert Galaxies
Seyfert Galaxies
Transcript: The first systematic survey of active galaxies was carried out by Carl Seyfert in the 1940s. The galaxies h... Read more
28 Jul 2011
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Ranked #9
Properties of Supermassive Black Holes
Properties of Supermassive Black Holes
Transcript: Stellar mass black holes are a natural anticipated consequence of stellar evolution. Evidence for their exi... Read more
28 Jul 2011
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Ranked #10
Black Holes in Nearby Galaxies
Black Holes in Nearby Galaxies
Transcript: Careful studies from space have allowed us to make a census of the population of supermassive black holes in... Read more
28 Jul 2011
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1min
