Lecture2_GEOG1400

242 solar days year 1 solar day time it takes a

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Unformatted text preview: period of revolution = YEAR period 1 year = 365.242 solar days year 1 solar day = time it takes a single point on the earth’s solar surface to make one complete rotation The earth has an elliptical orbit: FIGURE 4.5 Extreme summer and winter positions of the Earth with regard to the Sun Extreme summer and winter positions of the Earth with regard to the Sun Revolution Revolution ► Earth moves (revolves) faster at one end of moves (revolves) faster at one end of its orbit and ► Slower at the other end at the other end ► Length of the solar day is actually an average of 24 hours average of 24 hours Distance: Earth Earth-sun distance is 149.6 million kilometres distance is 149.6 kilometres WOW Distance Distance ► Perihelion shortest shortest distance is 147 million km and occurs on Jan occurs on Jan. 3 ► Aphelion the the longest distance is 152 million km and occurs on July 5 July The Seasons The Seasons ► The The seasons are related to changes in the seasons are related to changes in the amount amount of energy the earth is receiving from t...
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This document was uploaded on 04/11/2014.

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