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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. 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. Glossary of astronomy - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_astronomy

    This glossary of astronomy is a list of definitions of terms and concepts relevant to astronomy and cosmology, their sub-disciplines, and related fields. Astronomy is concerned with the study of celestial objects and phenomena that originate outside the atmosphere of Earth. The field of astronomy features an extensive vocabulary and a ...

  4. Dioptra - Wikipedia

    en.wikipedia.org/wiki/Dioptra

    Michael Jonathan Taunton Lewis (2001), Surveying Instruments of Greece and Rome, Cambridge University Press, ISBN 0-521-79297-5; Lucio Russo (2004), The Forgotten Revolution: How Science Was Born in 300 BC and Why It Had To Be Reborn, Berlin: Springer. ISBN 3-540-20396-6. Evans, J., (1998) The History and Practice of Ancient Astronomy, pages 34 ...

  5. Glossary of meteorology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_meteorology

    Also actiniform. Describing a collection of low-lying, radially structured clouds with distinct shapes (resembling leaves or wheels in satellite imagery), and typically organized in extensive mesoscale fields over marine environments. They are closely related to and sometimes considered a variant of stratocumulus clouds. actinometer A scientific instrument used to measure the heating power of ...

  6. Astronomy - Wikipedia

    en.wikipedia.org/wiki/Astronomy

    A second gravitational wave was detected on 26 December 2015 and additional observations should continue but gravitational waves require extremely sensitive instruments. [ 62 ] [ 63 ] The combination of observations made using electromagnetic radiation, neutrinos or gravitational waves and other complementary information, is known as multi ...

  7. Astrophysics - Wikipedia

    en.wikipedia.org/wiki/Astrophysics

    Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. [1] [2] As one of the founders of the discipline, James Keeler, said, astrophysics "seeks to ascertain the nature of the heavenly bodies, rather than their positions or motions in space—what they are, rather than where they are", [3] which is studied ...

  8. Physical cosmology - Wikipedia

    en.wikipedia.org/wiki/Physical_cosmology

    Physical cosmology is a branch of cosmology concerned with the study of cosmological models. A cosmological model, or simply cosmology, provides a description of the largest-scale structures and dynamics of the universe and allows study of fundamental questions about its origin, structure, evolution, and ultimate fate. [1]

  9. Heliotrope (instrument) - Wikipedia

    en.wikipedia.org/wiki/Heliotrope_(instrument)

    The heliotrope is an instrument that uses a mirror to reflect sunlight over great distances to mark the positions of participants in a land survey. The heliotrope was invented in 1821 by the German mathematician Carl Friedrich Gauss.