Star Trails

My Seattle friend, Mike, sent me this photo, which he took last night. Here are the notes he attached:

The illumination of the grass on the soccer field comes from the frame when the cops drove by. Otherwise it would be dark ground.

Lots of planes in the sky too, and notice that their much faster angular velocity means that the gap between consecutive photos is noticed, whereas the slower moving stars still appear continuous.

Here are more star trail photos from another photographer.