I believe CRUX is taken from the Latin language meaning cross or crossroads ("Crux of the problem")...
I can understand the four stars... but a crux could have many more, as long as they line up in a cross pattern...
But then again, I could be fulla-crap-ola and have absolutely no idea what I'm talking about...
As for Wikipedia... got to admit... I love it. However, there is a saying about it... "Wikipedia is like the Bible, just because a lot of people contribute to it does not necessarily make it right..."