These star trails are a little more pronounced. Remember I referred to hot pixels a few shots back? Every camera will exhibit them, especially in night time photography. The warmer and more humid it is outside, if you have long exposure settings, i.e. 10, 15, 20 minutes or more, you would have seen tiny red dots, i.e. pixels, showing up on your photo. These are caused by your cameras sensor getting warmer. When I shoot in a few months, and the temps get noticeably colder, 20, 30 degrees, 20 - 50 minute exposures will be possible with little, if any, hot pixels showing up.