Glow in the Dark...Moons?

 I have a glow in the dark shirt. In fact, I'm wearing it right now (although it's getting kind of worn).

It depicts three wolves howling at the moon, but the real moon of course doesn't glow in the dark.

There's a moon in the solar system, however, that might just do that.

And it is, surprise surprise, Europa.

Lab experiments have indicated that the heavy radiation from Jupiter likely interacts with the surface and thin atmosphere in a way that makes the moon, yes, glow in the dark.

This is actually important, as we might be able to analyze the glow and establish things about the surface composition before we hopefully send a probe to land on the icy moon.