GEO 101 Chapter Notes - Chapter 3: Equinox
13 Nov 2017
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Aphelion the earth is furthest away from the sun (july 4) Perihelion the earth is closest to the sun (january 3) Earth rotates west to east once every 23 hours and 56 minutes: this is why we have daylight savings time. Rotation: earth"s axis is tilted (cid:1010)(cid:1010). (cid:1009) degrees to the plane of the ecliptic, titled 23. 5 degrees from the perpendicular. March 21 vernal equinox: 12 hours of daylight and 12 hours of night. June 21 summer solstice: longer day, tropic of cancer. September 23 autumnal equinox: 12 hours of daylight and 12 hours of night.
