Friday, 5 August 2011

challenges to navigation

Having just arrived in Sydney, Australia, and going out walking after sunset (abruptly early having come from our Scottish summer with long hours of daylight) we looked up to the winter night sky and it occurred to us that we didn't recognise anything.

Similarly, orienting oneself with sun proves confusing until one realises that whilst the sun still rises in the east and sets in the west, it's movement over the sky is in the northern half of the sky, as opposed to the south in the northern hemisphere.

"The shadow of a sun dial moves clockwise in the northern hemisphere (opposite of the southern hemisphere). During the day the sun tends to raise to its maximum at a southerly position, whereas in the southern hemisphere it raises to a maximum that is northerly in position (as it tends towards the direction of the equator). In both hemispheres the sun rises in the east and sets in the west."

the night sky in the Southern Hemisphere
Climbing mountains here, the North face is the gentler side, the more temperate.

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