Software for simple animations
I am looking for a simple software to animate basic objects. I like to create educational animations, often on astronomy topics. So far, I am doing this under Windoze, but would like to do it in a plain Linux environment in the future. Currently, I often use specialized programs. However, I would also like to take a more generic approach to animating. For example, I am about to write an article about earth's rotation and the speed that an object (or person) has related to the latitude it is located. I would like to create an animation showing a globe with a spot on it. Then, I'd like to spin that globe a little and show how the spot moves. It would be good enough if I can create a plain color globe. Best, however, would be if I could add satellite images of earth as a texture. And now comes the hardest thing: I am actually not much of a graphics person, so I am looking for an as easy to use tool as possible.
A sample of previous work can be found here, so that you get an idea of what I am doing:
Earth observed from Mars
And feedback would be deeply appreciated.