stephp

Yes it's possible, but which tool is able to apply such processing ?

With imagination one can see a really big Pacman eating stars :D This faint (really because there is almost no visible signal on raw images) nebula is located in Cassiopeia 44 Images stacked with ...

No I didn't get a 1/10,000s shot!! This is a buggy value. This shot is the result of 15 images stacked, each of them exposed 20 sec.

Only 15 shoots were stacked. Exposure was 20 sec for each photo. Not so much cropped because M31 is a very large object (about 4°). The final image is 3952 pixels in its largest dimension.

Yes it is. Pentax is the only brand that allow to do this: Taken with a Sigma 300/2.8 telelens, a K-3 and the o-gps1 unit. This picture is the result of several images stacked together.

The Lagoon (Messier 8) & Trifid (Messier 20) Nebulae 63 images stacked with DeepSkyStacker. Stacked image processed with darktable. Lens: Sigma 300/2.8@f3.2 Exposure time is 20s for each image ...