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Stream the full Nova Season 52 Episode 4 movie online for free in crystal-clear HD quality. No downloads required—just press play and enjoy the action, complete with English subtitles for an enhanced viewing experience.

Ice might seem familiar to us on Earth, but out in the solar system, it can get quite exotic. From Uranus's ultra hot superionic ice, to glaciers of nitrogen ice on Pluto, to carbon dioxide snow on Mars, ice is a fundamental building block throughout our cosmic neighborhood. Visit some of the strange, frozen worlds of our solar system to discover why the ice here on Earth so special – and why we wouldn't be here without it.