The Synthesis of "Cartesian coordinate system"

An introduction to René Descartes, the French philosopher and mathematician who revolutionized Western thought with his ideas and methods.

Discover celestial coordinates, the system astronomers use to map the sky. Learn how right ascension and declination pinpoint objects in the universe.

Discover declination, the celestial equivalent of latitude. Learn how astronomers use this crucial coordinate to map the stars and navigate the cosmos.

Discover the celestial sphere, an imaginary globe used by astronomers to map stars, planets, and constellations in the night sky. Your guide is here.