Who knew there was such a thing as airglow?

This photo is from NASA's Astronomy Photo of the Day site. The headline says "Rainbow airglow over the Azores". Cool, isn't it?

You can see a huge version of the image by clicking on it.

Pretty cool up there

This is a photo of a layer of ice crystals acting like a prism in the atmosphere. Nice, eh? I've seen completely circular rainbows but never one like this. I'm putting it on my list of things to see, along with auroras.

You'll find an amazing photo every day at NASA's Photo of the Day site. Here's a link. Go there often!

Eerie cloud

Today's photo on NASA's Astronomy Picture of the Day site is described as a "cap cloud over the Sierra Nevadas". Is that cool, or what?

To see a larger version of the image, click here.