McGraw-Hill have produced some very interesting animations and interactives on the subject of Space and Earth/Moon. They appear to be aimed at KS5 and above, but you will find that quite a few can be used to demonstrate concepts lower down the school such as this Lunar Phases Interactive

View the Animations here, and the interactives Here.

Thanks to @jobadge and @psychemedia for the link via Twitter

For KS2/KS3 don’t forget to take a look at Earth Moon and Sun, The Childrens University of Manchester and also the Day/Night Demonstrator from ICT Games.