The Constellations Cluster is, as of writing this, technically our smallest cluster. If you count fragments, which we usually don't, there are thirteen members. As far as full-fledged members, however, there are only two of us: Aries (me!) and Pisces.
We're sourced from the zodiac constellations themselves, not the horoscope. We are, as a collective (and even more as a cluster), not a fan of western astrology, which makes our existence as an active cluster something of a nuance when it comes to how we're percieved by others.
You may have noticed that all of our faceclaims are by loojii; this is because of both our personal preference for cohesion and the fact that their designs happen to match how we remember looking pretty much exactly; Pisces' original PFP was a purple-skinned Picrew, before we discovered the "Zodiac Princes" while scrolling through Pinterest.