Holy crap! Why is the Earth glowing green?

See that green glow? It's not the aurora borealis. Although it's technically present in almost all views of the Earth from space, it can only be clearly seen at certain angles and certain times. It's a phenomenon known as airglow, and it's our own atmosphere lighting up like glow-in-the-dark paint. » 12/06/12 6:20am 12/06/12 6:20am