Have you ever noticed how sometimes when you look at your watch, the second hand seems to linger for slightly more than a second? This is due to saccadic maskin

Have you ever noticed how sometimes when you look at your watch, the second hand seems to linger for slightly more than a second? This is due to saccadic masking. When your eyes move quickly, your brain cannot process the visual data. So it just backtracks and fills it in backwards with whatever it ends up seeing. If the satellite passed into the shadow of the earth and dissappeared, your eyes could move to track another one without you seeing any perceptual gap at all. https://en.wikipedia.org/wiki/Saccadic_masking https://en.wikipedia.org/wiki/Saccadic_masking