Jun 10, 2012
Season 7 Episode 6
Hitch a ride on the journey of a comet as it roars from the cold, dark outer reaches of the solar system to the fiery surface of the Sun. Visit the surface of each planet, from the mountains on the moons of Neptune, to the caves beneath Mars, to a solar tsunami. You'll also tour the lesser-known "neighborhoods" of the Solar System, like The Oort Cloud and planet-sized asteroids like Eris and Ceres. Witness the punishing extremes experienced by a massive, grit-covered snow-ball as it travels 300 million miles from the edge of the Solar System to the skies above earth.