Editor's note: Crap. I wrote this post within milliseconds after the first of these awesome images came out, but somehow didn't publish it. Now they are all over the place, and the message is ancient news in internet-time. But the science is timeless!
This is the first close-up image from a fly-by of the comet by NASA's Deep Impact mission. Expect more coming in. Despite the delicious appearance, however, it wouldn't be prudent to take a bite; the comet is spewing out cyanide.