A: In general, pearls symbolize innocence, love, perfection and purity. Gold and black pearls are symbolic of wealth and prosperity. Fresh water pearls are thought to help open the heart to receiving love and to encourage self-love. White pearls are symbolic of faith, a pure heart, innocence and a pure mind.
He measured the angular separation of the Sun and the Moon when its phase was first or third quarter to derive the distance between Earth and Sun in terms of the distance between the Earth and the Moon. Eratosthenes (276-194 BC) also measured the distance between Earth and Sun as 804,000,000 stadia.
Eratosthenes: Eratosthenes, Greek scientific writer, astronomer, and poet, who made the first measurement of the size of Earth for which any details are known. At Syene (now AswÄn), some 800 km (500 miles) southeast of Alexandria in Egypt, the Sunâs rays fall vertically at noon at the summer solstice. Eratosthenes noted that at Alexandria, at the same date and time, sunlight fell at an angle of about 7.2Â° from the vertical. (Writing before the Greeks adopted the degree, a Babylonian unit of measure, he actually said âa fiftieth of a circle.â)