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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.
Ptolemy's Handy Tables (Ancient Greek: πρόχειροι κανόνες, romanized: Procheiroi kanones) is a collection of astronomical tables that second century astronomer Ptolemy created after finishing the Almagest. The Handy Tables elaborated the astronomical tables of the Almagest and included usage instructions, but left out the ...
The oldest form of astronomy, optical or visible-light astronomy, observes wavelengths of light from approximately 400 to 700 nm. [149] Positioning an optical telescope in space eliminates the distortions and limitations that hamper that ground-based optical telescopes (see Astronomical seeing), providing higher resolution images.
List of largest optical telescopes in the 18th century includes various refractors and reflectors that were active some time between about 1699 to 1801. It is oriented towards astronomy, not terrestrial telescopes (e.g., spyglasses). Many of the largest were metal mirror reflectors, some of which had substational apertures even for the 20th ...
This category contains articles about instruments used for astronomy. Subcategories. This category has the following 8 subcategories, out of 8 total. ...
Ptolemy's Almagest was published in 1st century AD. It remained the most authoritative text on astronomy for over 1500 years. [2] It details over 1022 stars, constellations, galaxies and nebulae along with their positions, ecliptic coordinates and magnitudes. It also describes in detail the construction of instruments to aid in Astronomical ...
The data was incorporated into the Almagest along with the first list of stellar magnitudes and was the primary astronomical reference until modern times, 190-120 BC. Bonner Durchmusterung - whole-sky astrometric star catalog, 1859–1903; Astrographic Catalogue - international astronomical survey of the entire sky. The survey was performed by ...
An edition in Latin of the Almagestum in 1515. The Almagest (/ ˈ æ l m ə dʒ ɛ s t / AL-mə-jest) is a 2nd-century mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy (c. AD 100 – c. 170) in Koine Greek. [1]