Why do visible passes always occur in bunches?
The local time at which ISS passes above your location is slowly shifting. For a number of consecutive days, it will be visible after sunset. After some time, it will be visible before sunrise, again for a number of consecutive days. As a result, you will receive evening alerts and morning alerts from @twisst in bunches.
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I was wondering. On a two pass night, can I see on the first pass ISS moving away from me, and the second pass more or less moving towards me? (angle say 160 degrees)