English: A monument built in Baghdad the capital city of Iraq in 1980 of a cube representing Saturn, this cube is a remnant of the ancient worship of El. Ancient Hebrews represented Saturn with the six pointed star, which later became the Star of David (it also had many other esoteric meanings). The symbol is still found on Israel’s flag. Shielded by a dome representing the firmament, (vault of Heaven, or arch of the sky covering the flat earth) the word firmament comes from the Latin firmus, or "firm," and this description of the sky as something solid reflects ancient ideas of the way the universe was constructed. The first stargazers imagined the sky as a sphere, and it wasn't until the late 1500s that the idea of an infinite universe was seriously considered.