The Earth's revolution on its axis produces the changes
from light to darkness and its orbit around the sun produces
the seasons (Note: NOT because of the distance to the sun. In
actual fact, the earth is closest to the sun during the winter
months). The earth is tilted at an angle to the sun and first
the north and then the south becomes nearer to it, the closest
point traversing from the Tropic of Cancer (23.5° N) to the
Tropic of Capricorn (23.5° S), the sun being above Cancer on
22 June and above Capricorn on 22 December. It is above the
Equator on 21 March and 21 September.
The sun rises in the east and sets in the west - but not
EXACTLY in the east and west. Indeed there is a seasonal
variation. In the Northern Hemisphere, when at its highest
point in the sky, the sun will be due south; in the Southern
Hemisphere this noonday point will mark due north. The
hemisphere will be indicated by the way that shadows move;
clockwise in the north, anticlockwise in the south. Shadows
can be a guide to both direction and time of day.

Shadow Stick Method 1
Method 1
On a patch of flat, clear ground place a metre-long (3ft)
stick as upright as possible. Note where ites shadow falls and
mark the tip with a pebble or stick (a). Wait at least 15
minutes and mark the new shadow tip (b). Join the two and you
have the directions of east and west. The first mark is west.
North-South will be at right angles to this line. This method
works at any time of the day when there is sunshine and at any
latitude.

Shadow Stick Method 2
Method 2
Another, more accurate, method (if you have the time) is to
mark the first shadow tip in the morning. Draw a clean arc at
exactly this distance from the stick, using the stick as a
centre point. As midday approaches the shadow will shrink and
move. In the afternoon, as the shadow lengthens again, mark
the EXACT spot where it touches the arc. Join the two points
to give east and west. West is the morning mark.
Back to Top