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  2. List of astronomical instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_astronomical...

    An astronomical instrument is a device for observing, measuring, or recording astronomical data. [citation needed] They are used in the scientific field of astronomy, a natural science that studies celestial objects and the phenomena that occur in the cosmos, with the object of explaining their origin and evolution over time.

  3. List of astronomical instrument makers - Wikipedia

    en.wikipedia.org/wiki/List_of_astronomical...

    The following is a list of astronomical instrument makers, ... Name: Lifespan: Country of work : Abiyun al-Bitriq: fl. 630 Jabir ibn Aflah (Geber) c. 1100–1150 ...

  4. List of percussion instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_percussion_instruments

    Instruments commonly part of the percussion section of a band or orchestra. These three groups overlap heavily, but inclusion in any one is sufficient for an instrument to be included in this list. However, when only a specific subtype of the instrument qualifies as a percussion instrument, only that subtype is listed here.

  5. List of musical symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_symbols

    Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...

  6. List of musical instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_instruments

    This is a list of musical instruments, including percussion, wind, stringed, and electronic instruments. Percussion instruments (idiophones and membranophones)

  7. List of symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_symbols

    Hazard symbols; List of mathematical constants (typically letters and compound symbols) Glossary of mathematical symbols; List of physical constants (typically letters and compound symbols) List of common physics notations (typically letters used as variable names in equations) Rod of Asclepius / Caduceus as a symbol of medicine

  8. These are the pedophile symbols you need to know to protect ...

    www.aol.com/news/2016-04-26-these-are-the...

    Click through the see images of the symbols: Show comments. Advertisement. Advertisement. Holiday Shopping Guides. See all. AOL. Glamorous gold jewelry staples you can wear on repeat — all under ...

  9. Astronomical symbols - Wikipedia

    en.wikipedia.org/wiki/Astronomical_symbols

    Pluto's name and symbol were announced by the discoverers on May 1, 1930. [92] The symbol, a monogram of the letters PL, could be interpreted to stand for Pluto or for Percival Lowell, the astronomer who initiated Lowell Observatory's search for a planet beyond the orbit of Neptune.