[Ben_Edict]

The first one is very nice with the silhoutetted tree as an eye catcher. Well composed and executed.

You could compensate the colour cast in the lower part with a slight colour correction gradient - but that is about the only thing, I would try to improve.

Ben

[Ash]

Good results.
Indeed these would do well with a reduction in temperature and boost in magenta tinting, but otherwise they're sharp and well detailed.

These are hard to make into great shots because of having to find an adequately interesting foreground that is absolutely still to complement the star trails.