Astronomy Basics: Celestial Sphere, Constellations, and Earth's Movements, Quizzes of Astronomy

Download Astronomy Basics: Celestial Sphere, Constellations, and Earth's Movements and more Quizzes Astronomy in PDF only on Docsity! TERM 1 Celestial Sphere DEFINITION 1 In astronomy and navigation, the celestial sphere is an imaginary sphere of arbitrarily large radius, concentric with the Earth and rotating upon the same axis. TERM 2 Horizon DEFINITION 2 what blocks half our view of the celestial sphere when we're on Earth TERM 3 Constellations DEFINITION 3 A constellation is a certain area of the celestial sphere formed by stars. The celestial sphere does NOT move, the Earth does. TERM 4 North/South Celestial Poles DEFINITION 4 two points on the celestial sphere that do not move TERM 5 Celestial Equator DEFINITION 5 The celestial equator is a great circle on the imaginary celestial sphere, in the same plane as the Earth's equator. TERM 6 Rotation DEFINITION 6 spin motion of an object TERM 7 Revolution DEFINITION 7 orbital motion of one object around another TERM 8 Ecliptic DEFINITION 8 The ecliptic is the plane of the earth's orbit around the sun. TERM 9 Zodiac DEFINITION 9 the belt shaped region of the sky surrounding the ecliptic that passes through 12 constellations TERM 10 Rotation Axis DEFINITION 10 the imaginary line that runs through the Earth from North to South Pole that a planet spins on