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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.
Historically, the definition of a scientific instrument has varied, based on usage, laws, and historical time period. [1] [2] [3] Before the mid-nineteenth century such tools were referred to as "natural philosophical" or "philosophical" apparatus and instruments, and older tools from antiquity to the Middle Ages (such as the astrolabe and pendulum clock) defy a more modern definition of "a ...
Space telescopes are used at certain wavelengths where the atmosphere is opaque, or to eliminate noise (thermal radiation from the atmosphere). Optical astronomy is the part of astronomy that uses optical instruments (mirrors, lenses, and solid-state detectors) to observe light from near- infrared to near- ultraviolet wavelengths.
A beam compass is an instrument, with a wooden or brass beam and sliding sockets, cursors or trammels, for drawing and dividing circles larger than those made by a regular pair of compasses. [2] Scribe-compasses [3] is an instrument used by carpenters and other tradesmen. Some compasses can be used to draw circles, bisect angles and, in this ...
1881 painting by Marie Bashkirtseff, In the Studio, depicts an art school life drawing session, Dnipropetrovsk State Art Museum, Dnipropetrovsk, Ukraine. Visual arts education is the area of learning that is based upon the kind of art that one can see, visual arts—drawing, painting, sculpture, printmaking, and design in jewelry, pottery, weaving, fabrics, etc. and design applied to more ...
As a growth area of design, the number of spatial design practitioners work within existing disciplines or as independent consultants. The subject is studied at a number of institutions within the UK, [3] [4] Denmark, [5] Switzerland, [6] and Italy [7] though, as with any new field of study, these courses differ in their scope and ambition. [8]
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A quadrant is an instrument used to measure angles up to 90°. Different versions of this instrument could be used to calculate various readings, such as longitude, latitude, and time of day. Its earliest recorded usage was in ancient India in Rigvedic times by Rishi Atri to observe a solar eclipse.