Definition, Meaning & Synonyms

planisphere

noun

/ˈplæn.ɪ.sfɪər/

Definition

A planisphere is a flat representation of the celestial sphere, showing the positions of stars and constellations as they appear at a specific time and location.

Examples

Using a planisphere, she was able to locate the North Star easily.
The teacher demonstrated how to read a planisphere during the astronomy class.
He pulled out his planisphere to show her the constellations visible that evening.

Meaning

The word ‘planisphere’ refers to an instrument that helps astronomers and stargazers to identify stars and celestial objects in the night sky. It is often used for educational purposes to aid in the study of astronomy.