"Wandering stars" is a term usually applied to the planets. When ancient stargazers created the original constellations thousands of years ago, they called the stars that formed those constellations "fixed," because they appeared rooted in their relative positions to each other.

verb: affix; 3rd person present: affixes; past tense: affixed; past participle: affixed; gerund or present participle: affixing

be able to be fixed