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In fact, scientists have been doing studies like this since the 1960s, releasing tracers such as zinc sulfide powder or sulfur hexafluoride gas into the stratosphere to study air currents.

Geiger and Marsden recorded the particles’ scattering by observing the flash, or scintillation, produced whenever one struck a glass plate coated with zinc sulfide.

That means that GJ 1214b is definitely shrouded with clouds—made not of water vapor, but rather of potassium chloride, or perhaps zinc sulfide.

Did you know that boron is a critical component of Silly Putty and that radium, when combined with zinc sulfide, is the stuff that makes glow-in-the-dark watches glow?

The luminous watch dials consist of a coating of zinc sulfide under continual bombardment by the radium projectiles.