What's the greatest spaceship explosion of all time?S

Sometimes, a gallant space explorer has no choice but to make a massive sacrifice, and blow up the spaceship. And sometimes, a ship just blows up whether you want it to or not. But what's the coolest, or most dramatic, spaceship explosion of all?

Please include a picture, book cover or clip of the detonation in question. And mention where it comes from, and why it rules. Thanks!

Top image: Star Trek III: The Search for Spock.