|
This sundial
shows:
-
the
local solar midday: the vertical line (13° 22’ 10’’ compared to
Greenwich)
-
the
time zone midday: the line which is a bit inclined ( 15° 00’
compared
to
Greenwich) six minutes and twentuy seconds is the time which
separates the first east meridian from Aiello.
“The time
equation”, indicated by the lemniscata shows the adjustement of
the
irregular time due to the changeable speed of the earth during
its orbit
around the
sun. |
