They orbit around galactic centres like satellites — the Milky Way, for example, hosts over 150 of them. (constellation-guide.com)
But given its mass and distance, it should be bright enough to have been seen by now, he says, although it could be obscured by the bright galactic centre. (newscientist.com)
The galactic centre is a crowded place, however, so observers will have to slog though «a rainforest of sources» to sieve out lensed images, says Petters. (newscientist.com)