Astronomical observations in the visible range are a constant bet against the weather. One can do good science only if specific criteria are met. However, despite being a waste of valuable time at the telescope, adverse conditions often give us incredible scenery, especially at sunset and sunrise. Here I show a photo taken during a cloudy sunset I witnessed during one of my observing run at the New Technology Telescope (NTT), at La Silla in Chile: the Sun painted this "oil on canvas".
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