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galaxies: active (5) |
quasars: general (5) |
accretion, accretion discs (1) |
Astronomía (1) |
BL Lacertae objects: general (1) |
black hole physics (1) |
galaxies: evolution (1) |
galaxies: formation (1) |
galaxies: jets (1) |
galaxies: Seyfert (1) |