The first image is of Sagittarius, slightly cropped to put the center of the Milky Way galaxy at dead center in the photo. If you work at it, you can make out the teapot of Sagittarius. This was a thirty-second exposure; note the airplane entering from the left.
The second image is a tighter crop showing the airplane track, with the two wingtip lights flashing every couple of seconds.
A thirty second exposure is long enough for star trails to just begin to show, which is why all the stars look like parallel peanuts.