Here's why:

* Stars appear to move due to parallax: This is the apparent shift in a star's position against the background of distant stars as the Earth orbits the Sun. This is the same principle as holding your finger up in front of your face and closing one eye, then the other – your finger appears to shift against the background.

* The greater the parallax, the closer the star: The more a star appears to move (greater parallax), the closer it is to Earth.

* Stars that appear to not move are very far away: Stars that are so distant that their parallax is too small to be measured appear to remain fixed in the sky. This doesn't necessarily mean they're closer to Earth, just that their distance makes the parallax effect negligible.

In summary:

* The *amount* of apparent movement (parallax) is directly related to a star's distance. More movement means closer, less movement means further.

* Stars that appear not to move are likely very far away, but their distance makes the parallax effect too small to detect.

Important Note: The parallax effect is only noticeable for relatively close stars. Most stars are so far away that their parallax is too small to measure even with the most powerful telescopes.