Labels:text | screenshot OCR: THE CELESTIAL SPHERE FROM THE EARTH, the constellations around the Earth in an east-west seem to be stuck on the inside of a direction every 24 hours. A grid of hollow sphere known as the celestial lines known as right ascension and sphere. This sphere appears to rotate declination help astronomers locate stars on the celestial sphere, and star maps are a projection of the imaginary sphere onto a flat surface. North celestial pole The Earth The Earth The Sun South celestial pole Dominant area NORTHERN CELESTIAL SPHERE PROJECTED SPHERE During a specific time of the year and The celestial sphere is time of night, a particular area of the concentric with the Earth and celestial sphere dominates the night sky. has corresponding poles. THE 88 CONSTELLATIONS
