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  2. Algebraic notation (chess) - Wikipedia

    en.wikipedia.org/wiki/Algebraic_notation_(chess)

    Algebraic notation is the standard method for recording and describing the moves in a game of chess. It is based on a system of coordinates to uniquely identify each square on the board. [1] It is now almost universally used by books, magazines, newspapers and software, and is the only form of notation recognized by FIDE, the international ...

  3. Crescent - Wikipedia

    en.wikipedia.org/wiki/Crescent

    The crescent shape is a type of lune, the latter consisting of a circular disk with a portion of another disk removed from it, so that what remains is a shape enclosed by two circular arcs which intersect at two points. In a crescent, the enclosed shape does not include the center of the original disk. The tapered regions towards the points of ...

  4. New moon - Wikipedia

    en.wikipedia.org/wiki/New_moon

    The original meaning of the term 'new moon', which is still sometimes used in calendrical, non-astronomical contexts, is the first visible crescent of the Moon after conjunction with the Sun. [3] This thin waxing crescent is briefly and faintly visible as the Moon gets lower in the western sky after sunset. The precise time and even the date of ...

  5. Lunar phase - Wikipedia

    en.wikipedia.org/wiki/Lunar_phase

    A lunar phase or Moon phase is the apparent shape of the Moon 's directly sunlit portion as viewed from the Earth (because the Moon is tidally locked with the Earth, the same hemisphere is always facing the Earth). In common usage, the four major phases are the new moon, the first quarter, the full moon and the last quarter; the four minor ...

  6. Star and crescent - Wikipedia

    en.wikipedia.org/wiki/Star_and_crescent

    The star and crescent symbol used in the minted coins of the Sassanian Empire from the 3rd century until the 7th century. This coin was coined under Ardashir III. The Adoration of the Magi by Stephan Lochner; on the left, the crescent and star is depicted in the flag of representatives of Byzantium. The conjoined representation of a crescent ...

  7. Miscellaneous Symbols - Wikipedia

    en.wikipedia.org/wiki/Miscellaneous_Symbols

    Miscellaneous Symbols is a Unicode block (U+2600–U+26FF) containing glyphs representing concepts from a variety of categories: astrological, astronomical, chess, dice, musical notation, political symbols, recycling, religious symbols, trigrams, warning signs, and weather, among others.

  8. File:Triple-Goddess-Waxing-Full-Waning-Symbol.svg - Wikipedia

    en.wikipedia.org/wiki/File:Triple-Goddess-Waxing...

    Description. Triple-Goddess-Waxing-Full-Waning-Symbol.svg. English: Triple Goddess Symbol, composed of waxing crescent, full moon, and waning crescent (outlined version). Sometimes the crescents are tilted up a little to simulate the appearance of a young waxing moon above the horizon after just after sunset, and of an old waning moon above the ...

  9. Telegram's voice calls are secured by emojis - Engadget

    www.engadget.com/2017-03-30-telegrams-voice...

    This means that there are nearly 12.3 billion possible four-emoji combinations. This encryption system is based on the Diffie-Hellman key exchange, which was patented in 1977.