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Snapchat is an American multimedia instant messaging app and service developed by Snap Inc., originally Snapchat Inc. One of the principal features of Snapchat is that pictures and messages are usually only available for a short time before they become inaccessible to their recipients.
Planet symbols. A planet symbol or planetary symbol is a graphical symbol used in astrology and astronomy to represent a classical planet (including the Sun and the Moon) or one of the modern planets. The symbols were also used in alchemy to represent the metals associated with the planets, and in calendars for their associated days.
A classical planet is an astronomical object that is visible to the naked eye and moves across the sky and its backdrop of fixed stars (the common stars which seem still in contrast to the planets). Visible to humans on Earth there are seven classical planets (the seven luminaries ). They are from brightest to dimmest: the Sun, the Moon, Venus ...
The use of astronomical symbols for the Sun and Moon dates to antiquity. The forms of the symbols that appear in the original papyrus texts of Greek horoscopes are a circle with one ray () for the Sun and a crescent for the Moon. [ 3] The modern Sun symbol, a circle with a dot (☉), first appeared in Europe in the Renaissance.
The Antikythera mechanism was an analog computer from 150–100 BCE designed to calculate the positions of astronomical objects. Ancient Greek astronomy is the astronomy written in the Greek language during classical antiquity. Greek astronomy is understood to include the Ancient Greek, Hellenistic, Greco-Roman, and late antique eras.
In astrology, planets have a meaning different from the astronomical understanding of what a planet is.Before the age of telescopes, the night sky was thought to consist of two similar components: fixed stars, which remained motionless in relation to each other, and moving objects/"wandering stars" (Ancient Greek: ἀστέρες πλανῆται, romanized: asteres planetai), which moved ...
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Firmament. An artist's depiction of the early Hebrew conception of the cosmos. The firmament ( raqia ), Sheol, and Tehom are depicted. In ancient near eastern cosmology, the firmament signified a cosmic barrier that separated the heavenly waters above from the Earth below. [ 1]