I love the Astronomy Picture of the Day website - indeed I thoroughly recommend typing in a random past date and scrolling forwards with the "tomorrow's picture" button for hours - but today's picture was absolutely mind-blowing!
I mentioned a while ago that, like sound, light (or, rather, the electromagnetic spectrum) works in many more wavelengths than our eyes can see - and this is what X-rays show of the Crab Nebula. 954 years after Chinese and possibly Native American observers saw the star explode, the force of the spinning pulsar creates jets and accelerates charged particles in a glowing cosmic wind 9 light years across. This was an impulse post, not a planned one, so I'm not going to go into X-rays for the time being - but I did want to show you the Chandra observatory's Crab Nebula photo gallery. Excuse me while I go and have a browse.