That's not a particularly helpful thing to say without posting a link to find where black holes are, too. http://www.linda-goodman.com/ubb/Forum24/HTML/207504.html And yes, I appear to have at least 11 conjunctions or oppositions with the list there even with a 1-2 degree orb only considered. However, without more information about what they'd actually do or not do in relation to each planet, node or angle, it gets hard to say what's what with any of them. They also don't list the distance from Earth or their relative size or importance levels anywhere.
The below quoted from the sidebar at http://www.zodiacarts.com/whatsup/Alex.shtml
"Galactic Astrology utilizes varying types of astronomical phenomena in astrologic interpretation, including Black Holes, whose essence is change; Quasars, focused on accomplishment and visibility; Pulsars, which are informational in nature; and Masers, sometimes likened to cosmic cattle prods. The celestials of our own system can be difficult enough to manage, but when we get to the effects wrought by anomalies in Deep Space, we're really out of our neighborhood, and often out of our depth.
Black Holes, in particular, can be difficult to work with. Highly mercurial, with a power base that makes Pluto seem infantile, Black Holes represent dramatic change, the sudden, swift, complete reversal of the status quo, when conditions alter in the twinkling of an eye to ones wholly unrecognizable from what went before, and returning to the way things were becomes impossible. In essence, you have changed universes; you can't go home again.
Black Holes act as liminal guardians, portals between realties. Making contact with one in our daily lives can often feel as if we have been uprooted from the everyday reality of the Light World and thrust into an alien environment, an Underworld which, although ominous and threatening, can also be the repository of vast riches and the wealth of the knowledge of the subconscious.
Black Holes are sources of energy drain, requiring more of our focus and attention than we would often like, but they are also the repositories of incredible reserves of energy; some folks seem to have the knack of tapping these energies, others merely contribute to them. Seen as a metaphor for alienation, disempowerment, waste and dissociation, Black Holes have emerged as a powerful image of our times."