#sun

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1/ This is the longest exposure I've ever taken: 8 months long! It shows the Sun's path on the sky between Apr 17 - Dec 11 2018, as seen from ESO's Paranal Observatory in #Chile. This is part of a collaboration with Diego López Calvín, an expert in solarigraphy: https://solarigrafia.com Diego sent me some of his hand-made #pinhole cameras, which I placed all over Paranal. So what do we see here? See thread below 👇 #astrodon #astronomy #astrophotography #sun #photography
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💁🏻‍♀️ TIL: A team of scientists engineered an electrospun purple #fabric that reflects about 88% of sunlight and stays cooler than white #cotton in outdoor tests. In direct #sun, it ran up to 6º C (11º F) cooler than dyed purple cotton, and on simulated skin it beat uncovered skin by nearly 8º C. The lightweight #textile also kept its cooling effect after 50 wash cycles and showed strong durability under #UV exposure. 👉 https://interestingengineering.com/science/purple-fabric-reflects-sunlight-stays-cooler #science #materials #physics #color #heat #innovation #engineering #clothing #research
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