Where does “sun star” come from?

sun star (English) comes from English star, from Middle English sterre, from Old English steorra, from Proto-West Germanic sterrō, from Proto-Germanic sternô, from Proto-Indo-European h₂stḗr, from Proto-Indo-European h₂eHs- — to be/become dry; to burn, to glow; hearth.

sun star (English): Any of various starfishes belonging to Solaster, Crossaster, and allied genera, having numerous rays

Definitions

  1. Any of various starfishes belonging to Solaster, Crossaster, and allied genera, having numerous rays

Ancestry of “sun star”, step by step

sun star traces back through two separate lines of ancestry.

via English star

StepLanguageWordMeaning
1EnglishstarAny small luminous dot appearing in the cloudless...
2Middle Englishsterrestar
3Old Englishsteorrastar
4Proto-West Germanicsterrō
5Proto-Germanicsternôstar
6Proto-Indo-Europeanh₂stḗrstar
7Proto-Indo-Europeanh₂eHs-to be/become dry; to burn, to glow; hearth

via English Sun

StepLanguageWordMeaning
1EnglishSunAbbreviation of Sunday
2Middle EnglishsunneAlternative form of sonne; sun
3Old Englishsunnesun
4Proto-West Germanicsunnāsun
5Proto-Germanicsunnǭthe sun
6Proto-Indo-Europeansh̥₂uénsun; the Sun
7Proto-Indo-Europeansóh₂wl̥sun
Every word from Proto-Indo-European h₂eHs-Every word from Proto-Indo-European h₂stḗrEvery word from Proto-Germanic sternô