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What Are Active Galaxies?
Astronomy - Ch. 29: Galaxies (11 of 14) Active Galaxies
What's the difference between an AGN and a Black Hole?
Active Galaxies Part 1
Astro101 - "What is the difference between an active galactic nucleus and a quasar?"
NASA | Swift Finds 'Missing' Active Galaxies
Arp's Evidence #1: The Connection between Active Galaxies, Jets, X-Ray Sources and Quasars
Galaxies, part 2: Crash Course Astronomy #39
Astronomy Active Galaxies
Baseline #3 - Viewing Active Galaxies
Active Galaxies
NASA | NASA's Fermi Shows How Active Galaxies Can Be
