A formidable sky goddess from a fictional Polynesian star navigation mythology stands atop a massive whale skeleton beached on a volcanic black sand beach at night, wearing flowing tapa cloth robes in deep ocean blue and silver embroidered with celestial navigation maps and nautilus shell armor, her long black hair streaked with phosphorescent algae and woven with bioluminescent flowers, holding a carved wooden astrolabe, fierce mystical expression, dramatic aurora borealis illumination with swirling emerald and magenta tones contrasting warm amber firelight from nearby village torches, rich details of ancient petroglyphs carved into cliff faces and waves crashing against lava rocks, oil painting texture with digital precision, powerful dignified three-quarter composition against epic star-filled Pacific night sky with rising constellations, 4k hyperdetailed digital art