I don`t understand the constellation of the nightsky``?

Jèspere que vous pouvais traducter ca en francais! When you see the sky at night and you presume the sky cirle coming from the shadow of the sun behind the earth, there could not possibly be the same sky in winter as it is in summer....because of the fact that all the stars must revolve around the sun with an enormous speed. On the other hand, if the stars of the distance of 300 000 light years around the earth and the sun, stay at there place in outer space, you inevitably must have a different night star constellation every couple of nights . Why is this so and why do i have so much difficulties in understanding, that there are only two hemispheres of starsky around us on earth and not many more variying constellations as the blue planet tottles through the universe of our solar system. ? Thanks for an explenation! markus