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.
In the same century, Aristarchus computed the size and distance of the Moon from Earth, obtaining a value of about twenty times the radius of Earth for the distance. These figures were greatly improved by Ptolemy (90â168 AD): his values of a mean distance of 59 times Earth's radius and a diameter of 0.292 Earth diameters were close to the correct values of about 60 and 0.273 respectively.