Ray Star. Eight rays fire from a single focal dot — four long cardinal rays in accent cyan, four short ink diagonals — so the mark is simultaneously a star (Astra) and radiographic emission lines (radius / Rad), tapering thick-to-thin like a collimated beam. The center dot is the read: the one point every ray resolves to, echoing a radiologist’s signed focus. The alternating long/short rhythm keeps four bold strokes dominant, so the glyph stays unmistakable at 16px while the faint aperture ring and finer diagonals reward the 96px hero.