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SEASONS SEASONS VOCABULARY Rotation – The time it takes an object to spin around once, the earth rotates once a day. Revolution – The time it takes one object to go around another. The earth revolves around the sun once a year or every 365.24 days. SEASONS VOCABULARY Zenith – The highest point or closest to directly overhead. Altitude – The angle or height an object is above the horizon. Horizon – Imaginary line where the sky stops and the land begins. ECLIPTIC – THE PLANE WHICH THE PLANETS ORBIT THE SUN. THE MOON ALSO TRAVELS IN THE ECLIPTIC PLANE AROUND EARTH. SEASONS VOCABULARY Tropic of Cancer – 23.5˚ north of the equator the point where the sun appears directly overhead on June 21st. Tropic of Capricorn – 23.5˚ south of the equator the point where the sun appears directly overhead on December 21st. SEASONS VOCABULARY Perihelion – The closest point in a planets orbit to the sun. Aphelion – The farthest point in a planets orbit to the sun. SEASONS VOCABULARY Equinox – Length of the day and night are equal in the northern and southern hemispheres. September 21st is the Autumn Equinox, March 21st is the Spring Equinox, on both days the sun is directly overhead the equator at noon. Solstice – The shortest or longest days of the year December 21st or Jun 21st. SEASON’S DIAGRAM WINTER SOLSTICE MULTIPLE EXPOSURE