Refers to stars that shine brightly, often used poetically or in set phrases like 綺羅星のごとく (like glittering stars) to describe a gathering of talented or beautiful people.
きらきら is a mimetic word for 'glittering' or 'sparkling', often used adverbially, while 綺羅星 is a noun referring to glittering stars themselves.
Etymology
Compound of きら (kira, onomatopoeic for glittering) and 星 (hoshi, star), with rendaku voicing of hoshi to boshi. The kanji 綺羅 are ateji chosen for their aesthetic connotations.
