Astronomers use the concept of the celestial sphere to map the positions of stars.
Астрономы используют концепцию небесной сферы для картирования позиций звезд.
Definitionen
The celestial sphere is an imaginary sphere of arbitrarily large radius, concentric with the Earth, onto which all celestial bodies (such as stars, planets, and the Moon) are projected for the purpose of astronomical observations and navigation.
