We see many stars twinkling in the sky at night.
All stars are fixed at their places. Each one is a ball of hot, glowing gas. They have their own light. Some of them are very big, even bigger than the Sun. They are farther away than the Sun so, they look smaller than the Sun.
Do you want to know why we do not see the stars during the day. Why are they visible only at night?
In fact, the stars are present in the sky during the day-time also. However, they are not visible then because of the bright sunlight.
There is actually a star, the pole star, which is situated in the direction of the earth’s axis. It does not appear to move.