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![](https://www.ufo-science.com/wp-content/uploads/2014/03/sensibilisation_spectro_ufo-science660.jpg)
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Utilisation of a diffraction grating to identify a Thai Lantern in few seconds, et observe the specific sprectum of a incandescent source.
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Third video of our web serie “The minute of UFO-Science”.
Today : What is the V.I.G.I.E project ? What is its purpose ?
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