Yes, they appear as slowly moving stars in the night sky.
You can see satellites orbiting. If you go on a clear night to somewhere which is far from city lights, you will sometimes see dots moving across the sky - these are satellites reflecting sunlight.
Yes you can but with a telescope
yes, with satellites that is how they get proof
satellites
they can see through clouds but not smoke.
There are satellite tracking feeds available to show the current position of satellites in 3-D on Google Earth. See related links below for details.
Chinese navigation satellite see below.
yes
Satellites have done a lot of things. We can now use GPS to not get lost. We can see places we normally would never go.
We do not HAVE to use satellites. You can look up and see the sun or stars - depending on the time of day - using only your eyes.
The five major types of artificial satellites are: research, communications, weather, navigational, and applications. Please see the related links.
the brightest and the sixth biggest planet