A choice when photographing starry skies is whether to render stars as dots or as lines. The former requires short exposure times and the latter longer. However, to reach something resembling a dot an exposure time of less than 30 seconds is needed (exact time depends on where in the sky the lens is pointed). To achieve this in a pitch black sky (appx. EV 0 or less) the sensitivity need to be high, i.e. very high ISO. This photo is exposed during 64 seconds at ISO 3200. Already at this shutter speed the stars are suspiciously "long".
The photo is taken south, and Orion is clearly visible in the right side, with the Jura rendered black. What nicely looks like a sunset is however nothing more than light pollution from the densly populated "Schweizer Mittelland", the flat(ter) space between Jura and the Alps. There is nothing revolutionary with this photo, other than the fact that it is taken from my balcony!
Starry sky over Jura, Switzerland
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