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  2. Catalogues of classical compositions - Wikipedia

    en.wikipedia.org/wiki/Catalogues_of_classical...

    Two volumes of a catalogue of the remaining works were published by Erich Hermann Mueller von Asow (1892–1964) in 1959. After von Asow's death, Franz Trenner (d. 1993) and Alfons Ott (d. 1976) published the third volume, based on von Asow's notes; this catalogue lists 323 titles, including Strauss's literary writings.

  3. Astronomical catalog - Wikipedia

    en.wikipedia.org/wiki/Astronomical_catalog

    Messier Catalog – The Messier objects are a set of astronomical objects first listed by French astronomer Charles Messier in 1771. Nebulae and Star Clusters was published in 1781, with objects M1 – M110. New General Catalogue compiled in the 1880s by J. L. E. Dreyer, lists objects NGC 0001 – NGC 7840. The NGC is one of the largest ...

  4. Timeline of astronomical maps, catalogs, and surveys

    en.wikipedia.org/wiki/Timeline_of_astronomical...

    c. 300 BC — star catalog of Timocharis of Alexandria. c. 134 BC — Hipparchus makes a detailed star map. c. 150 — Ptolemy completes his Almagest, which contains a catalog of stars, observations of planetary motions, and treatises on geometry and cosmology. c. 705 — Dunhuang Star Chart, a manuscript star chart from the Mogao Caves at ...

  5. History of PDF - Wikipedia

    en.wikipedia.org/wiki/History_of_PDF

    History of PDF. The Portable Document Format (PDF) was created by Adobe Systems, introduced at the Windows and OS/2 Conference in January 1993 and remained a proprietary format until it was released as an open standard in 2008. Since then, it has been under the control of an International Organization for Standardization (ISO) committee of ...

  6. PPM Star Catalogue - Wikipedia

    en.wikipedia.org/wiki/PPM_Star_Catalogue

    The PPM Star Catalogue ( Positions and Proper Motions Star Catalogue) is the successor of the SAO Catalogue. It contains precise positions and proper motions of 378,910 stars on the whole sky in the J2000 / FK5 coordinate system. It is designed to represent as closely as possible the IAU (1976) coordinate system on the sky, as defined by the ...

  7. How ‘Dengue Detectives’ Are Racing To Prevent A Super ...

    www.aol.com/dengue-detectives-racing-prevent...

    According to the WHO, that includes doing the following if you live in an area where dengue is spreading: Wearing clothes that cover as much of your body as possible. Using mosquito nets that ...

  8. How to lower or eliminate your risk of knee arthritis ...

    www.aol.com/strong-leg-muscles-could-help...

    So take a walk, do some wall sits, or sit in a chair and stand up 10 times without using your arms to push yourself up, Miller said. Just keep moving. “Our rule for osteoarthritis patients is ...

  9. (2,3,7) triangle group - Wikipedia

    en.wikipedia.org/wiki/(2,3,7)_triangle_group

    The (2,3,7) hyperbolic triangle group is a subgroup of the group of norm 1 elements in the quaternion algebra generated as an associative algebra by the pair of generators i, j and relations i2 = j2 = η, ij = − ji. One chooses a suitable Hurwitz quaternion order in the quaternion algebra. Here the order is generated by elements.