What is that moving pixel in frames 2 & 3, bottom mid right?
Hi Mistamoon. To explain where the pixel is please give XY coordinates. You can do this with a ruler on your monitor screen. Measure the width (w) and height (h) of the image frame. Then measure the distance (x) from the left hand side to the object. Divide x by w on a calculator and multiply by 100. That is 100*(x/w). This is the X coordinate as a percentage of the image width. Do the same for the vertical distance. Divide y by h on a calculator and multiply by 100. That is 100*(y/h). That is the Y coodinate as a percentage of the image height. You can then say the image is at X%,Y%. Anyone, with any monitor size, can then locate the object precisely. For example the big star is at X=58.0%, Y=17.6%.
If you meant the black dot on the big star, this is just overloading of the image sensing CCD by the star's brightness I think. But I am not sure if it is this you are speaking of.