Laboratory experiments have re-created the surface of Europa, one of the four large moons of Jupiter, with a surprising result — Europa glows in the dark. While we typically see the side of Europa facing Earth, this new study shows what this world might look like from its other side. This discovery is more than an interesting fact about the Solar System — it reveals secrets of the enigmatic moon. Europa on the rocks The icy surface of Europa is rich with salt, including magnesium sulfate (Epsom salt) and sodium chloride (common table salt). Each type of mineral radiates specific…
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