I have been working on this post for a while. We did a big space project in my school some years ago so we had many online resources to motivate our students.
The first one may be the most useful it has 5 different subjects:
It has some really good listening explanations with graphics and some activities. It may look for upper grades in the beginning but you’ll find great stuff in there.
Do check the ‘guia del profesor’ for some guidelines.
This is a good one to find some good reading information about some space missions. It may not have great animations but it is a good source of information for your upper students.
And last one, I love the graphics on this site. It has some information on one side and beautiful animations on the other. I can tell you that this can inspire beautiful space art.
If you need more Space resources do check my other blog entries for SPACE and have fun.