Hi,
sorry for not writing such long time, I was enjoying holidays for whole week. Anyway I am coming back with post about tidal force.
Tidal force is effect of gravitational force and it can be seen as for example tide.
So you have Moon which is attracting everything, even water in our oceans. Water closest 
to Moon is attracted with greatest force while water far away with least. As you can see on the picture there is Moon (Satellite) on the right this grants us two high tides per day.
So as is Moon orbiting it changes the place where low and high tides are.
This effect creates amazing things: rings! Planetary rings can be made by some satellite 
which moved too close to its planet and tidal forces were so strong that it ripped it apart, so there is higher probability that larger planet will have ring.
Tidal force also can be “seen” in effect called spaghettification which is made by black holes or other massive objects.
Dragallur
Science and rationality 
I am curious how manmade satelites respond to these forces… By a way do you know Roche limit?
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well man-made satellites are much smaller. There will never be such a distance between two opposite sides. I read about it once, and thanks I should totally fill in my post with Roche limit, it is very important, strange that I forgot about it.
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