Tag: sun

Heiligenschein or Halo Effect

Here is a lovely example of Heiligenschein, or 'halo effect'. When a bright light source is directly behind us, we see a brighter ring around the shadow of our head. The direct light means fewer shadows in that area, but light is also reflected back to our eyes more effectively.…

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Red Sun, Sand and Wildfires

As Ophelia ravaged the west coast of Ireland yesterday, the south coast of England was spared the high winds. The storm did suck in smoke from Portugese and Spanish wildfires and also dust and sand from the Sahara. The small airborne particles scattered the light at the blue end of…

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Mabiniogion and the Stars

A couple of nights ago I listened to an interesting talk about the Mabinogion and the night sky, by the astronomer Martin Griffiths (pictured). We stood in a garden before adjourning to an inflatable planetarium. It was the launch of the Llangwm Literary Festival. The Mabinogion stories were set down…

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