Top 20 Greatest Moments in Space

Xploration Outer Space names “The Top 20 Greatest Moments in Space: Caught on Video.” These are the most breathtaking, the most dramatic, the most important and the most fun images captured by the space program from here in our solar system to the galaxies beyond. From milestones in space travel to startling discoveries in space, this special episode counts down a memorable Top 20 that’s out of this world.