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  2. Common Era - Wikipedia

    en.wikipedia.org/wiki/Common_Era

    The expression can be traced back to 1615, when it first appears in a book by Johannes Kepler as the Latin: annus aerae nostrae vulgaris (year of our common era), [3] [4] and to 1635 in English as "Vulgar Era". [a] The term "Common Era" can be found in English as early as 1708, [5] and became more widely used in the mid-19th century by Jewish ...

  3. List of time periods - Wikipedia

    en.wikipedia.org/wiki/List_of_time_periods

    Ancient history – Aggregate of past events from the beginning of recorded human history and extending as far as the Early Middle Ages or the Postclassical Era. The span of recorded history is roughly five thousand years, beginning with the earliest linguistic records in the third millennium BC in Mesopotamia and Egypt .

  4. Johannes Kepler - Wikipedia

    en.wikipedia.org/wiki/Johannes_Kepler

    Ismaël Bullialdus accepted elliptical orbits but replaced Kepler's area law with uniform motion in respect to the empty focus of the ellipse, while Seth Ward used an elliptical orbit with motions defined by an equant. [109] [110] [111] Several astronomers tested Kepler's theory, and its various modifications, against astronomical observations.

  5. Wikipedia:Neutral point of view/BCE-CE Debate - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Neutral_point_of...

    This 1908 example from the Catholic Encyclopedia is the first use of “Common Era” I can find, and I believe it was used synonymously with, or to replace “Vulgar Era.” In short, Christians first use “Vulgar Era” as an alternative to AD.

  6. Mysterium Cosmographicum - Wikipedia

    en.wikipedia.org/wiki/Mysterium_Cosmographicum

    Johannes Kepler's first major astronomical work, Mysterium Cosmographicum (The Cosmographic Mystery), was the second published defence of the Copernican system.Kepler claimed to have had an epiphany on July 19, 1595, while teaching in Graz, demonstrating the periodic conjunction of Saturn and Jupiter in the zodiac: he realized that regular polygons bound one inscribed and one circumscribed ...

  7. Musica universalis - Wikipedia

    en.wikipedia.org/wiki/Musica_universalis

    Musica universalis—which had existed as a metaphysical concept since the time of the Greeks—was often taught in quadrivium, [8] and this intriguing connection between music and astronomy stimulated the imagination of Johannes Kepler as he devoted much of his time after publishing the Mysterium Cosmographicum (Mystery of the Cosmos), looking over tables and trying to fit the data to what he ...

  8. 20 iconic slang words from Black Twitter that shaped pop culture

    www.aol.com/20-iconic-slang-words-black...

    The term has been around in Black American communities since the 1990s, appearing as early as 1992 on "It Was a Good Day" by Ice Cube, who raps: "No flexin', didn't even look in a n----'s direction."

  9. Astronomia nova - Wikipedia

    en.wikipedia.org/wiki/Astronomia_nova

    Astronomia nova (English: New Astronomy, full title in original Latin: Astronomia Nova ΑΙΤΙΟΛΟΓΗΤΟΣ seu physica coelestis, tradita commentariis de motibus stellae Martis ex observationibus G.V. Tychonis Brahe) [1] [2] is a book, published in 1609, that contains the results of the astronomer Johannes Kepler's ten-year-long investigation of the motion of Mars.