Image of the Week: September 19 - 25, 2004

Your shadow and the Autumnal Equinox

Sun-cast shadows, autumn colors - This image was taken in November, not on an equinox. And not at noon.

Shadows cast by the sun
can be used to determine the Sun's angle above the horizon.
At noon on an equinox that angle can be used to easily calculate the latitude at which the observation was made.
Subtract the noon sun angle from 90 degrees to obtain latitude.
Don't forget that Daylight Savings Time affects the actual time of "high" noon, when the sun is at its highest point of the day.
The equinox this year occurs at 1630 UTC on September 22.
That's 9:30 PDT.
Today all locations on Earth will experience
12 hours of daylight and 12 hours of night.
Day equals Night
Equinox

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Links
Go to Earth and Moon Viewer MAP of EARTH
Go to APOD: 2003 September 23 - Egging On the Autumnal Equinox
Go to The Equinox
Go to Autumnal equinox - infoplease
Go to Equinox Autumnal
Go to The Angle of the Sun's Rays
Go to Measuring Sun Angle - LCC Image of the Week May 23, 2004
Go to Earth's Seasons, etc. 1992-2020
Go to Equinoxes And Solstices 1992-2005
Go to Earth and Moon Viewer
Go to
Go to LCC Earth Science WEB LINKS Page

CLICK on the colored links above to go to those LCC Web Pages.

LCC Image of the Week 12-03-04
David Cordero
dcordero@lcc.ctc.edu