I captured these star trails a couple of weeks ago while in Las Vegas for work. A few of us made a quick trip out to Red Rock to do a little light painting. While we were painting, I grabbed my Canon 6D and used a Fat Gecko to mount it to the windshield of my rental car. I dialed in my settings for a 10 second exposure and locked down the cable release. This is a stack of 431 images, captured over about 70 minutes.