https://www.youtube.com/watch?v=aagnFu4oJtg

18 cosas que no sabias

https://www.youtube.com/watch?v=ffxX0d90dn8

Fases de la luna

https://www.youtube.com/watch?v=ma0kKMc9PbE

Los Eclipses
https://www.youtube.com/watch?v=_zMk0NhycJQ

las estrellas

https://www.youtube.com/watch?v=UymxMp7j7Ps

https://www.youtube.com/watch?v=sWzC7pKL2BY

Estamos en la recta final

https://www.youtube.com/watch?v=HYf9YeN39d0 

https://www.youtube.com/watch?v=iQMfbdKTCPQ 

 https://www.youtube.com/watch?v=7iE7Z0nE4tk

https://www.youtube.com/watch?v=9DMUT9LOtD0