Why is it that in this photo we don't see any outline of the body of the actual plane? Is it because after the plane moves from its current position, light from behind it is now hitting the sensor during the rest of the duration of the long exposure time, essentially covering/hiding the plane?
Maybe the plane does not reflect too much light and when it moves fast, it only contributes little to the color of each pixel comparing to the background.
I'm confused about why there are so many points of light on the path. It seems like they correspond to light sources on the tips of the wings of the plane and one in the middle, but if this is a long exposure photo, shouldn't they just be blurred out into lines? They really look like artifacts of a camera shutter, as if the camera is taking a shot at an even spacing as the plane moves on the path, or at least somehow putting more emphasis on these particular snapshots. You can even see that the spacing is wider as the plane is moving vertically, as if it's moving faster during that section before leveling out. But this doesn't make any sense to me if the aperture is open for the entirety of the shot.
I am guessing the light is blinking at certain rate so only points of light were captured on its path.