There are a lot of photographers don't know what does mean photograph many photos during a certain period of time .. The question is: Are all the 5000 images which taken during the 48 hours contains the same content found in the last picture?... The answer is simply no! .. The sun will shine in a time and sets at a time, and the moon as well and this means that part of the images does not contain the moon or the sun and at the same time when the photographer chooses a particular time for photographing the Milky way certainly in time with no existence of the moon or the sun. Overall, the photographer will receive a certain number of images for several moments (sunrise, sunset, moon, stars, etc.) for a full day or two days of photographing on one point or several connected points to be merged all together at the end. So, 5000 doesnt mean 5000 images overlayerd .. If you just overlayer it you will get NOTHING .. So i pick up the best momments (sunset, moving of the moon in 6 places, and the milky way, ) other pictures i use all of them to get the color of full day .. If someone thing its a big number, fine, but i like to capture big numbers of images, i have fun with it .. Summary of speech: Big nummber of images doesn't mean all the time "TIMELAPSE" and the Stars are lines or some poeple asked me about the disapperd 4994 moons in the picture. There are those who pick up a large number of images for a certain period of time to document the stages of one phase(exp. one day), like me, for example ..
I will search in the near future for reliable(website, magazine, or similar) , in order to explain the method of imaging such images