Golden Spiral Poster — Celestial

Quarter circles in successive squares; consecutive radii are in the ratio φ ≈ 1.618. Poster on 200 g satin paper, dark or ivory background, format of your choice: A4 (21 × 30 cm), 30 × 40 cm or 50 × 70 cm. Celestial style: the figure surrounded by orbits, stars and the phases of the Moon, as decoration.