The sun is not moving the earth is
If by "seem to move" you are referring to perspective then it is true, since the Earth rotates on an axis and revolves around the sun, if we do not know that it is the Earth that is moving, it would seem that stars move across the sky, except for the pole star Polaris, which is aligned with the north axis and remains "fixed" in its place.
The earth is turning
since earth rotates, the constellations will seem to move across the sky.
...rotation.
Well, that would be because Earth is rotating.
because the worl is spinning slowly and because the clouds move and make it seem like stars are moving.
The sun doesn't move through the sky. The Earth is held by the Sun's gravitational pull and orbits the Sun while spinning.This is why it looks like the Sun is moving through the sky.
Yes because stars move so they would move through the night sky!!!! If you were to watch a constellation, it would appear to move through the sky but really the Earth's rotation and revolution about the Sun gives the appearance of the stars moving.
Fractions of light through nitrogen in the atmosphere.
Because as you stand there, the earth turns your face from west to east. As time goes on through the day and night, you have to turn your face farther to the west, to see the same sky things that used to be right in front of you. Since you don't feel yourself turning, it looks to you as if the sky things are moving from east to west.
Lightening.
Because We R Revolving round the sun it is an optical illusion that v see the sun movin across the sky in the day.