I just thought it had a thing about it because it's the first, and only time I've gotten only six matches. I also have a theory that those specially marked gems over the people have something to do with it too. Because some have like a darker surrounding with markings around them.
Anyone do searches on constellations and neopets? I did and I found that this stuff is hinted at in the editorial section of the neopian times for week 137. It's probably nothing... but they are talking about the stuff in the explore page so who knows.