Star Trails at Guilderton Lighthouse, Western Australia

            Nikon d5500
325 x 30s
ISO 400
f/3.5
11mm

Processed in startrails.exe

This is a 3 hour exposure (325 images at 30 seconds each) of the Guilderton Lighthouse 125km north of Perth in Western Australia. The waning gibbous moon was below the horizon when I began and started moving above the horizon about two thirds of the way through, casting its ambient light on the lighthouse and adding a blue hue to the sky.

The weather forecast for the night was for light winds but when I got there it was absolutely howling, so much so that my car was being rocked by the wind. With star trail images, any slight knock on your tripod can ruin the final image so I'd already given up as soon as I saw how windy it was. But I'd come this far so I wasn't going home straight away! Luckily the wind wasn't nearly as bad behind the lighthouse and not a single image was affected. Phew! 

In the past I had inadvertently overexposed the individual stars in my star trail images with a high ISO and wide aperture, this time though I lowered the ISO and stopped down the aperture to allow the colour of the stars to show, hence the colourful trails. Stars emit a different coloured light depending on their surface temperature with cooler stars emitting red/orange light and hotter stars emitting a blue light.

   

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Taken in: Australia / Western Australia / Guilderton (show map)

Taken on: January 13, 2018

Tags:

Guilderton

lighthouse

cosmology

southern hemisphere

cosmos

star tracing

southern

star trails

startrails.exe

star circles

star tracks

stacked

stacking

stack

Western Australia

Australia

DSLR

long exposure

rural

tokina

11-16mm

D5500

night photography

Nikon

stars

astronomy

space

galaxy

Astrophotography

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