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That's also a good point @intrepidphotos :) Satellite trails do sometimes add in an unwanted element - weird straight line through the lovely curved lines.

Glad to know someone else agrees with me on the "cheating" aspect.

Well if the only way to get the star trail in the 1980's was to take multiple 30 second shots and combine them we would think that taking a single 3 hour exposure was cheating. It is all just arbitrary ways of capturing a single perception of reality.