PLANISPHERE Meaning and
Definition
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A planisphere is a circular map or chart depicting the positions of celestial objects viewed from a specific location on Earth. This instrument is primarily used by astronomers, navigators, and amateur stargazers to facilitate the identification and observation of stars, constellations, and other astronomical bodies at any given time.
The planisphere consists of two adjustable disks, often made of durable material like plastic or metal, which are connected by a pivot in the center. The larger outer disk represents the entire celestial sphere, exhibiting the projected positions of stars and constellations visible from a particular latitude on Earth. This disk is generally marked with a circular band denoting months, days, and hours to enable accurate time-based observations.
The smaller inner disk, also known as the mask or window, is manually rotatable to replicate the current date and time. When aligned with the appropriate markings on the outer disk, it displays the visible portion of the night sky overhead for a particular moment. By rotating and aligning these two disks accordingly, users can track the movement of celestial objects across the sky in real-time.
Overall, a planisphere is a practical and user-friendly tool that allows individuals to easily examine and interpret the night sky, enhancing their understanding and enjoyment of astronomy.
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A sphere or globe projected on a plain surface; a map exhibiting the circles of a sphere.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
Common Misspellings for PLANISPHERE
- olanisphere
- llanisphere
- -lanisphere
- 0lanisphere
- pkanisphere
- ppanisphere
- poanisphere
- plznisphere
- plsnisphere
- plwnisphere
- plqnisphere
- plabisphere
- plamisphere
- plajisphere
- plahisphere
- planusphere
- planjsphere
- planksphere
- planosphere
- plan9sphere
Etymology of PLANISPHERE
The word "planisphere" has its roots in Latin and Greek. It is derived from the Greek words "planē" meaning "wandering" or "wandering stars" (referring to the planets) and "sphaira" meaning "sphere". In Latin, "planē" became "planetae" meaning "planets", and "sphaira" became "sphaera" meaning "sphere". When combined, they formed the word "planētae sphaera", which eventually evolved into the word "planisphere" in English. The term "planisphere" originally referred to a representation of the positions of celestial bodies on a two-dimensional surface such as a map or a disk.
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