While waiting for my code to run at work today, I stumbled across this image of Kn 61 from the Gemini Telescope. This is known as a planetary nebula, where bubbles of gas are thrown out from a dying star. Ultraviolet light from the hot, dense core light up the expelled gas, creating the beautiful object seen below.
I've seen a lot of astronomy-related images, but this one is one of the coolest I've seen in a while. Wow!