Elle MacPherson -- Clearly Not of This Earth

Hurry up and look at this photo of Elle MacPherson in a bikini, because at some point she's going to return to her home planet and we'll never see her again.

The 50-year-old supermodel (kids, this is what a supermodel looks like) posted the ridiculous photo to her Twitter page the other day, with a caption reading, "Super greens... After super swim."

As if you needed more proof Elle looks INSANE for her age ... Courtney Love just turned 50 as well.

Rock on, Elle.