LONGITUDE (to measure East-West),
is all a matter of time…
LONGITUDE (to measure East-West),
is all a matter of time…
TIME ON BLUE MERIDIAN:
1300
1400
1200
1500
OVERHEAD
SUNLIGHT
15°
30° 45°
LONGITUDE (to measure East-West),
is all a matter of time…
WEST
Morning
OVERHEAD
SUNLIGHT
15°
Noon
Afternoon
EAST
PRIME0°
MERIDIAN
120°
15° TIME ZONES
Time at 0° Longitude is called Greenwich Mean Time,
Universal Time Coordinated (UTC), ZULU time, etc.
There
The
As
It
isthe
now
local
must
earth
1400
time
be
rotates
along
in
a meridian
each
15°
the
time
the
prime
where
zone:
local
meridian.
the
day
time
1200
changes.
on
Ifalong
itthe
is Monday
meridians
the
It is thein180°
0° meridian
advances
London,
meridian
what
along
one day
hour
which
is itis
atplotted
other
locations
the
International
aroundDate
the world?
Line.
0600
The day changes at
midnight, 0000, right?
-90
MONDAY
TUESDAY
MERIDIANS
TUESDAY
WEST
Prime
1200 Meridian 0
EAST
International Date Line
0000
Monday
90
MONDAY
MONDAY
Monday here
Tuesday
180
NOON
SUNLIGHT
Monday afternoon
and night
Two different
days at the
same place???
1800