21. UNA FANTASIA LUMINOSA
http://www.youtube.com/watch?v=0QHgEkuL3tY&feature=related
22. LA VIA LACTEA
http://www.youtube.com/watch?v=Hv579bFWTVI&feature=related
23. EL INFINITO
http://www.youtube.com/watch?v=B40bJBMEHBI&feature=related
24. BIG BANG, BIG CRUNCH
http://www.youtube.com/watch?v=2mC2DM8xQPA&feature=related
25. AGUJEROS NEGROS Y MATERIA OSCURA
http://www.youtube.com/watch?v=NW6hylNAIg0&feature=related
26. ATMÓSFERA DE LA TIERRA
http://www.youtube.com/watch?v=_iCWPa46drg&feature=related
27. ATMÓSFERA DE VENUS
http://www.youtube.com/watch?v=oeTK0_tXX9A&feature=related
28. ATMÓSFERA DE MARTE
http://www.youtube.com/watch?v=oeTK0_tXX9A&feature=related
29. ATMÓSFERA DE JÚPITER
http://www.youtube.com/watch?v=fZqe7Jk5smw&feature=related
30. ATMÓSFERA DE TITÁN
http://www.youtube.com/watch?v=UZJrnYzm3DI&feature=related
