Astrological and astronomical symbols have historically overlapped. Medieval Byzantine codices preserved ancient horoscopes with planetary symbols. Modern sun symbol appeared in Renaissance as circle with dot. Classical planetary symbols traced to Greek papyri from late Classical period
Moon's gravitational pull creates two tidal bulges on Earth's opposite sides. Sun's gravitational pull is 178 times stronger but creates smaller tidal bulges. Tides are not caused by Moon or Sun lifting oceans, but by varying gravitational forces
May is the fifth month in the Gregorian calendar with 31 days. Named after Maia, goddess of growth, and birth flower is lily of the valley. Marks astronomical spring in Northern Hemisphere and fall in Southern Hemisphere
Moon's radius is 1,079.6 miles (1,737.5 km) and diameter is 2,159.2 miles (3,475 km). Moon is 27% of Earth's size, making it fifth largest moon in solar system. Surface area is 14.6 million square miles (38 million square km). Moon's mass is 7.35 x 10²² kg, 1.2% of Earth's mass
Earth is the fifth largest planet in the solar system. It is the only planet with liquid water on its surface. The name "Earth" comes from Old English meaning "the ground". Earth is one astronomical unit away from the Sun
Dominant planets have greater impact on personality than zodiac sign. Birth chart calculator needed with exact date and time. Ruling planet is determined by ascendant sign on chart's left side