Question...

[fiberaddict]

WHAT, exactly, is meant by "New Moon"? The reason I ask....the Karaites say it's when the first sliver is seen. All the astronomical sites I checked (one of them is here) say no, it's when there is NO moon. My Feast books say it's NO moon....

So, who's right? I have a post rattling around, but I kinda need to nail this down first....