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.

stargazing

The Perseids meteor shower reached it's peak on Thursday night/Friday morning, though there's still a couple of days more in which to see them. The radiant point for this shower will be in the constellation Perseus. The thin, crescent moon will be out of the way early, setting the stage for a potentially spectacular show. For best viewing, look to the northeast after midnight.

Étienne Léopold Trouvelot (1827-1895)

 

aurora

  

November meteors

 

star cluster in Hercules

More of Trouvelot's lithographs can be found here