I took a picture of the foreground (houses and trees) about 15 minutes after sunset, so as to have sunlight but not harsh daytime sunlight. About 30 minutes after sunset, I started taking pictures of the sky. After combining the photos, they trees and houses obviously came out brighter because of the post-sunset daylight. My son was playing outside and fell, scraping his leg pretty bad, so I had to stop to help him. Therefore, I was only able to get about 32 minutes worth of movement. (ISO 800, 10 second exposures).