Faster than you can say “trans-Neptunian object” three times, the reaches beyond Neptune’s orbit start to fill out in this animation. And it’s astounding. Dots representing icy bodies large and small fill the area. What’s more sobering is realizing how little we knew about this region 20 years ago. Pluto was the first object in … Continue reading "Video: Beyond Neptune, It Sure Is Crowded With Icy Objects"