GHY-1020 Lecture Notes - Lecture 7: Equinox, Ecliptic, Subsolar Point
Document Summary
Latitudinal range- 23. 5 degrees n (tropic of cancer) to 23. 5 degrees s (tropic of. Not all of latin america is in the tropics. The sun"s rays come in by parallel lines. Ecliptic- the plane in which the planets revolve around the sun. Fall equinox- september 23, sun will be directly above the equator, first day of fall. Spring equinox- march 23, sun is directly above the equator, first day of spring. Summer solstice- june 21, sun is directly above tropic of cancer, longest day of the year at tropic of cancer there will be no shadows at noon on this day, first day of summer. Equinox- everyplace on earth will receive 12 hours of light and 12 hours of darkness. Circle of illumination- line that divides the earth"s night and day. Subsolar point- point where the sun is directly overhead. Axial tilt- reason for seasons, solstices, and equinoxes, earth is tilted at 23. 5 degrees.
