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Bosemon Spiel

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Colours in astronomical imaging

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Why is it hotter in summer and colder in winter?

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Solar system measurements

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Eclipsing binary stars

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S/n remnants expansion

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Why do buoys float, while an eraser sinks?

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Where do stars come from? Where do they go?

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Roemer and the speed of light

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The Great CERN-Game of Particles

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