
“Look at the North Star (Polaris),” pointed Roger, “it’s at 14 degrees declination, considerably lower in the sky than at home in Detroit.” We searched out other familiar star constellations from the rooftop patio in Antigua, Guatemala. Some we could not find, probably because they were now too low, below the horizon, to be seen here in Central America.
Back home I began to think about my journey not only for its scenic and cultural attractions or the country origins and destinations of other travelers, but with reference to our planet’s artificial longitude and latitude grid. My wife and I left home in Wisconsin (89∘W Longitude) to visit Antigua (90∘W Longitude); briefly stopping in Panama City on our return flight home (79∘W Longitude). Our journey strayed little from a narrow vertical line drawn from pole-to-pole as viewed on our globe at home.
In remembering conversations with other people we met in Guatemala, the geographic coordinates of their homelands now excite me with a new global perspective. One young man was from Sydney, Australia (151∘E Longitude) located in an entirely different hemisphere of the world, and twin sisters were from London (0∘ Longitude – on the Prime Meridian located through Greenwich, England).
Coordinates also include Latitude lines as deviation North and South from the Earth’s Equator. Our home is 42* N Latitude, Antigua is 14* N Latitude, and Panama City 8* N Latitude. These Latitude differences made big changes in daily temperature means as we moved closer to the Equator, and also with the perceptive differences in the 14 degrees declination of the North Star in the evening sky. If we could travel to Sydney, Australia, we would be in the Southern Hemisphere, 33* S Latitude, and we’d be experiencing Fall climate conditions instead of Spring.
The vertical Longitude lines are bracketed for 24 hourly time zones surrounding the Earth as it spins on a pole-to-pole axis relative to solar daylight availability. Our clocks precisely measure a 24-hour time cycle, but our social and cultural patterns artificially flow within a local, man-made time swath of Longitude. That is, until time shifts for Daylight Savings Time are used. As we wandered vertically along our 90* Longitude, we time-shifted one hour ahead at home in Wisconsin; but we shifted back to Standard Time while in Guatemala (they had tried daylight savings time, but dropped it when confusion made everything more difficult); and then we briefly adjusted our time pieces ahead one hour again when in Panama, a constitutional democracy formerly a US protectorate under the Panama Canal Treaty.
Maybe it’s better to not think about geographical coordinates and time when traveling. Simplify each day by wandering without plan or destination, then relax beneath the stars at night without determining exactly where you are.