Earth 10: prime meridian
the prime meridian.gif10. prime meridian: D/ Nullmeridian F/ méridien de Greenwich E/ primer meridiano; meridiano principal P/ meridiano de Greenwich I/ meridiano zero Nl/ nulmeridian D/ S/ N/ I/ S/ J/本初子午線(ほんしょしごせん) L/ C/ 本初子午線
