It's because as we go round the Sun, the dark side of the Earth looks out in a slightly different direction each night. The direction changes by a little under 1 degree from one night to the next, so that after a year the stars appear to be back where they started a year ago.
The reason for this quite simple if you just think about it, we see different celestial bodies at different periods because the earth is a rotating object, thus as we rotate different parts of space become viable while others move out of view.
We cannot see the stars that are "behind" the sun or nearly so because the sun's light hides them. We have to wait until the earth's orbit brings us into a position where the angular separation between the sun and the star is sufficient for us not to be blinded by the sun light.
The stars do not shift westward. They appear to shift that way because the earth spins on its axis and happens to tilt on its axis as well, that is also why we have seasons
The Earth rotates as it revolves around the Sun.
saucepan
No. Because when the Earth is rotating that is how we get night and day. But the stars don't change from night and day.
Does the question mean the distance between two stars? It does change, but very slowly on a human time scale. In 100,000 years most of the familiar constellations will look quite different.
Stars appear different from the sun because the sun is closer to the earth and the other stars are further away from the earth so that's why the appear differently when you look at them in the sky!!!!!
Stars in the sky appear at night time. If it is cloudy outside, stars will not be able to be seen by the naked eye. The moon also appears at night time.
saucepan
Constellations, but they are an illusion.
-- The planets you can see with your naked eye are generally brighter than a typical star. -- They also twinkle less than the stars do. -- Planets appear as small disks even in binoculars or small telescopes, but stars never do. -- From one night to the next, or certainly from one week to the next, the patterns formed by stars don't change, but planets move through those patterns.
The sun and stars change positions because Earth moves
Star constellations are the different patterns that the stars in the sky make up. They do not change their shape.
Patterns of stars are called constellations.
The patterns appear the same because the stars are so far away that their movement is not apparent to our eyes. They move across the sky because the earth is rotating and that makes it look like the stars are moving. Just like the sun does not move across the sky, the earth rotates and the sun appears to move, the same is with the stars.
No. Because when the Earth is rotating that is how we get night and day. But the stars don't change from night and day.
CONSTELLATIONS
Stars do not "change their light" as you put it, it is the atmosphere of our planet fogging it up like heat above a radiator making the star appear to "change its light"
No. Ancient peoples attributed patterns to the stars.
Constellations are made up of star patterns. Over tens of thousands of years, as the stars move and slowly change their locations, new constellations may appear. Since stars are technically "matter" AND they are in the Milky Way Galaxy, I suppose the answer to your question could be "maybe". What do you mean by "matter" ?