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  2. List of unsolved problems in astronomy - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    This article is a list of notable unsolved problems in astronomy.Problems may be theoretical or experimental. Theoretical problems result from inability of current theories to explain observed phenomena or experimental results.

  3. De revolutionibus orbium coelestium - Wikipedia

    en.wikipedia.org/wiki/De_revolutionibus_orbium...

    Book I chapters 1–11 are a general vision of the heliocentric theory, and a summarized exposition of his cosmology. The world (heavens) is spherical, as is the Earth, and the land and water make a single globe. The celestial bodies, including the Earth, have regular circular and everlasting movements.

  4. Epoch (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Epoch_(astronomy)

    It is useful for the celestial coordinates or orbital elements of a celestial body, as they are subject to perturbations and vary with time. [1] These time-varying astronomical quantities might include, for example, the mean longitude or mean anomaly of a body, the node of its orbit relative to a reference plane , the direction of the apogee or ...

  5. Keres Defence - Wikipedia

    en.wikipedia.org/wiki/Keres_Defence

    The game often transposes to a Nimzo-Indian Defence, a Dutch Defence, a Queen's Gambit Declined, an English Defence, or a Bogo-Indian Defence. 3.Nc3 is likely to transpose into one of those openings: 3...Nf6 (Nimzo-Indian), 3...f5 (Dutch; Korn gives 3...Bxc3+ 4.bxc3 f5!, [3] played by Buckle) 3...d5 (an unusual form of QGD), or 3...b6 (English ...

  6. List of fictional elements, materials, isotopes and subatomic ...

    en.wikipedia.org/wiki/List_of_fictional_elements...

    It can also be worked into other forms with unusual properties such as reflecting only the light of the Moon. The fictional metal has appeared in other fantasy universes, games, and books. "Mythril" appears in the video game series Final Fantasy and Kingdom Hearts. "Mithral" is used in D&D books; "Milrith" in Simon the Sorcerer.

  7. Midnight at the Well of Souls - Wikipedia

    en.wikipedia.org/wiki/Midnight_at_the_Well_of_Souls

    The rest of the team discovers a surface anomaly near the north pole of the planet, where a hexagonal "hole" appears for a brief interval every day. Skander and Varnett both believe that they will be able to use this anomaly to access the planetary computer, and both set off to attempt to take control.

  8. Tradition Book: Celestial Chorus - Wikipedia

    en.wikipedia.org/wiki/Tradition_Book:_Celestial...

    Adam Tinworth reviewed Celestial Chorus for Arcane magazine, rating it a 5 out of 10 overall. [1] Tinworth comments that "For any player keen to take on the playing of such a religious character, this book provides a valuable grounding in the origin of the movement.

  9. The Horus Heresy - Wikipedia

    en.wikipedia.org/wiki/The_Horus_Heresy

    The Horus Heresy is a series of science fantasy novels set in the fictional Warhammer 40,000 setting of tabletop miniatures wargame company Games Workshop.Penned by several authors, the series takes place during the Horus Heresy, a fictional galaxy-spanning civil war occurring in the 31st millennium, 10,000 years before the main setting of Warhammer 40,000.