What does planisphere mean?
A planisphere is a circular map of the celestial sphere, used to show the position of stars and constellations at different times of the year. It is a two-dimensional representation of the night sky, typically used by astronomers, stargazers, and educators to help identify celestial objects and understand their movements. The planisphere is a useful tool for both beginners and experienced astronomers, providing a simple and intuitive way to navigate the night sky. Its circular design allows for easy visualization of the relationships between stars, constellations, and other celestial features. Overall, the planisphere is an essential resource for anyone interested in astronomy and the study of the night sky.
nounA planisphere is a circular map of the celestial sphere, typically used to show the position of stars and constellations at different times of the year. It is a two-dimensional representation of the night sky.
- A circular map of the celestial sphere.
- A device or tool used for astronomical observations.
"The astronomy club used a planisphere to help beginners identify constellations."
"The planisphere was a useful tool for stargazers."
"The museum exhibit featured an antique planisphere."
The plural form is used when referring to multiple planispheres.
"The museum exhibit featured several antique planispheres."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of planisphere
The word 'planisphere' comes from the Latin 'planum', meaning 'flat' or 'plane', and the Greek 'sphaira', meaning 'sphere'. The term has been used in English since the 17th century to describe circular maps of the celestial sphere.
Usage notes
The term 'planisphere' is often used interchangeably with 'star chart' or 'celestial map', but it specifically refers to a circular map.