celestial sphere

• Eine gedachte Kugel mit beliebig großem Radius um den Beobachter, auf die alle Himmelsobjekte wie Sterne, Planeten und die Sonne projiziert zu sein scheinen. Sie ist ein grundlegendes Konzept der Astronomie zur Kartierung und Positionsbestimmung von Objekten am Himmel.

An imaginary sphere of arbitrarily large radius, concentric with the observer, upon which all celestial objects such as stars, planets, and the Sun appear to be projected. It is a fundamental concept in astronomy for mapping and locating objects in the sky.

1. Imaginary sphere in astronomyC1formal

   An imaginary sphere of arbitrarily large radius, concentric with the observer, on which all celestial objects are considered to lie.

   Himmelskugel

   • Astronomers use the celestial sphere to map the positions of stars and planets.
   • The celestial sphere is divided into constellations.
   • The concept of the celestial sphere helps simplify the observation of the night sky.