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The ISS can appear quite large
Originally posted by TheLieWeLive
1. Really huge in size.
A lot of satellites that are close travel at "breakneck" speeds just to maintain orbit, again the ISS, which is in LEO, orbits the Earth 15.7 times a day, bit faster than your average family car, lol.
2. Darting from left to right at break neck speeds.
When a satellite goes into the Earhs shadow, it can appear to just disappear
3. Vanishes right before your eyes.