Where have you been, son?
Scientists discover hidden galaxies behind the Milky Way (explanation for "The Great Attractor?")
Read that but the headline is click bait - they only managed to see through some dust which obscured the area - and the real headline is that they discovered another 800 plus galaxies. They were also able to chart the various galactic clusters moving toward it and the distances (including our own cluster) from it. The Great Attractor itself remains unseen and a mystery. But we do know that whatever The Great Attractor is, it is bigger than the biggest known black hole - whose accretion disc would cover the orbit of Neptune.