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Sunset (left) with a splitted segment -
sunrise (right) with the separated red segment below the Sun.
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Sun setting behind low clouds with a split segment
on top (left) - Sunset over the southern slope of the Teide with the last blue light.
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Ice creating flower-like structures.
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Orographic cloud over the Teide top in forward scattered light with strong
iridescent colours - with the Sun setting lust left of the mountain top.
On the left, the buildings of the the cable car are visible.
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An orographic cloud appeared in the night due to strong wind on the lee side
of the Teide and remained almost constant in shape for several hours (left). -
The Teide in the morning twilight.
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A cloudbow (very small water droplets) occurred over the Themis telescope when
low clouds reached the observatory level (left). - At night the dome of the new Solar
telescope GREGOR shines red due to a system of sensors measuring the behaviour of the
foldable dome. The intensity is much lower than it appears on the 1-min exposure.
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A glory occurs around the observer's head (camera) when the Sun is behind the observer.
At the same time, the shadow and the twilight arc can be seen.
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A green flash occurred when the Sun was setting behind the northern slope
of the Teide, in nice contrast to the cloud tops lit red by the Sun (left).
Another evening the last sign of the Sun was a blue flash.
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The morning twilight is most colourful when humid air or clouds are in the higher
atmospheric levels.
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The thin lunar crescent is seen between the clouds which produce a colourful
scenery further west (right).
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