A users guide to the cosmos from the big bang to galaxies, stars, planets and moons. Where did it all come from and how does it all fit together. A primer for anyone who has ever looked up at the night sky and wondered. 　　Episode 1 Sun 　　Episode 2 End of the Universe 　　Episode 3 Jupiter 　　Episode 4 First Second 　　Episode 5 Saturn 　　Episode 6 Extinction