That marble moon is so small I had to put an arrow over it for you. So here's what it comes down to: If you want to show the Earth-sun-moon system, you'd seem to have two options. You could show ...

From the most powerful telescope orbiting Mars comes a new view of Earth and its moon, showing continent-size detail on the planet and the relative size of the moon. The view is available online ...

Getting to the moon takes a lot of small steps, like Europe's new LUNA training facility. But it's not there yet. Next step: a moon gravity simulator.