Black holes Dark matter Galaxies 2 Gravitation 2 Stars 2 % reductions 1 Accretion rate 1 Accretion, accretion disks 1 Accretion: accretion disks 1 Black Hole physics 1 Black hole physics 1 Confidence levels 1 Dark Matter 1 Fluid dynamics 1 Gravitational lensing: strong 1 ISM jets and outflows 1 ISM: jets and outflows 1 Mechanical 1 Non-detection 1 Planck mass 1 Primordial black holes 1 Quasar: supermassive black hole 1 Radio astronomy 1 Radio sources 1 Stellar-mass black holes 1 Supermassive black holes 1 Supersonic speed 1 Velocity 1 Velocity ratio 1 Very long baseline interferometers 1