Here's a breakdown:

* Vast Distances: The stars in a constellation are located light-years away from us. Even though they are moving, the distances are so immense that their movement is practically imperceptible over a human lifetime.

* Slow Motion: Stars do move, but their motion is extremely slow. It takes thousands, if not millions, of years for a star to noticeably shift its position relative to other stars.

* Relative Motion: While the stars within a constellation are moving, they are moving together as part of a larger structure within the Milky Way galaxy. This collective motion keeps the overall shape of the constellation relatively constant.

Important Note: While constellations appear static from our perspective, the stars themselves are constantly moving. Over extremely long periods, the constellations will slowly change shape and eventually become unrecognizable.