The Light of the Two Lamps of the Valar

The light of the lamps of the valar flowed out over the earth, so that all was lit in a changeless day. Almaren is actually the geographic center of arta, right? And i's surrounded by uno sort of perfectly symmetrical land masses. That's the thing you can actually say the geographic center because it is flat, number one. But you can't last. There's no center of the earth.