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

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

    Blueish metal, named after the game it features in; also commonly called 'rune'. In earlier versions of the game and the Old School game, it is the toughest workable metal, [73] and in the main game it is both the strongest workable metal in the free-to-play version, as well as being the main ingredient in the Elder Rune metal. [74]

  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. Kemeri 1937 chess tournament - Wikipedia

    en.wikipedia.org/wiki/Kemeri_1937_chess_tournament

    Kemeri 1937 was a chess tournament held in the resort town Ķemeri, Latvia, at the Gulf of Riga from 16 June to 8 July 1937. [1] There were three co-winners: Samuel Reshevsky, Salo Flohr and Vladimir Petrov.

  6. Near-Earth object - Wikipedia

    en.wikipedia.org/wiki/Near-Earth_object

    The smallest known near-Earth asteroid is 2015 FF 415 with an absolute magnitude of 34.34, [114] corresponding to an estimated diameter of about 0.5 m (1.6 ft). [137] The largest such object is 1036 Ganymed, [114] with an absolute magnitude of 9.18 and directly measured irregular dimensions which are equivalent to a diameter of about 38 km (24 mi).

  7. De revolutionibus orbium coelestium - Wikipedia

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

    De revolutionibus is divided into six "books" (sections or parts), following closely the layout of Ptolemy's Almagest which it updated and replaced: [6] 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 ...

  8. Endless Quest - Wikipedia

    en.wikipedia.org/wiki/Endless_Quest

    The result is that the books in the Endless Quest series resemble miniature novels with many different endings. The majority of the books in the series were based on Dungeons & Dragons (D&D), but some were based on other TSR games (e.g. Gamma World, Top Secret) or even licensed properties (e.g. Conan, Tarzan).

  9. The Dynamics of an Asteroid - Wikipedia

    en.wikipedia.org/wiki/The_Dynamics_of_an_Asteroid

    In the 2017 mobile game Fate/Grand Order, Moriarty's Noble Phantasm is called The Dynamics of an Asteroid. During the Shinjuku Pseudo-Singularity, his goal is to destroy the Earth following the theory developed in this book using the asteroid 101955 Bennu as the "bullet," and the abilities of the Phantom Spirit of der Freischütz to guarantee ...