"space cocktails" news and stories

I have no idea what makes this a "space" cocktail. It has gin, frangelico, and lemon juice, but I don't really see anything space age or astronomical or sky-oriented about it. Maybe it tastes like space? Well, if something tastes like space to you maybe you're taking something a little stronger than frangelico.

The recipe is from 1001 Cocktails, and it's pretty straightforward.