I'm still working on my 'elemental' collection and I thought I'd represent the moon and stars by using a timed exposure to capture star trails. To keep the moon from appearing like a monster albino bologna, I'm considering stopping down, then opening the lens up all the way for the last minute of so of the exposure. The effect I'm hoping for is for "dim" trails with bright defining moon and stars(this may take a few nights and triple espressos to accomplish!) My question is this: How do I get the star trails to travel in an arc like a "n" rather than a "u" in the sky? Which compass direction do I need to point my camera? I'm in North America(California) and as I recall the last time I shot star trails I had them flying in a "u"---I think I was aiming N or E (or NE?) The reason I ask is that I need to scout out an appropriate foreground I can access from the right direction in order to get the "n" flight path. Can anyone offer some guidence or suggest a resource?