"[W]hile these patterns, the constellations, remained unchanging over time, there were seven objects, or ‘heavenly bodies’, that seemed to move across the skies with a life of their own. They were given the name ‘planet’... ‘wanderer’... These... were the Sun, the Moon, Mercury, Venus, Mars, Jupiter, and Saturn... The number seven has long been held to have a certain mystical significance. There are seven days of the week reflecting the seven days of creation in the Bible. The Seven Deadly Sins are balanced by the Seven Heavenly Virtues. In Islam there are seven levels in heaven and the same number in hell. Rome was founded upon Seven Hills. It has been said that Isaac Newton divided the rainbow into seven colours in order to imitate the seven notes in a musical scale. Over time, each of the seven heavenly bodies came to be associated with a particular day of the week and with one of the gods from ancient mythology..."