APOD 4.1

The rugged terrain of Neptune's moon Triton make it EXTREME. Just look at it. There's evidence of ice volcanos. That's the OPPOSITE of the volcanos found on earth. That's hardcore stuff right there. The picture was taken back in 1989, yet another completly awesome year, by on of the most epic satellites ever: Voyager 2. Voyager 2 is so extreme, it's actually in the process of leaving our solar system. Leaving it! It's continuing mission: to explore strange new worlds, to discover new life and new civilizations, to boldly go where no one has gone before!
Willliam Lassell discovered Triton in October 1846 while trying to confirm his observation of rings around the planet Neptune. It turns out the rings were a product of his telescope's distortion, but not the planet. Ironically, Voyager 2 would discover a thin ring system around Neptune, but it would have been impossible for Lassel to observe.