Who’s visiting who? This chart of solar system exploration shows every robotic space probe currently exploring (or about to explore) a major solar system object… except for the Earth and Sun of course, because there are way to many of those to show on one chart.
Cool Solar System Exploration Site. The space weight is a great activity to show students how much they weigh on at he moon or a certain planet. You could also do the weight of objects if students do not want to weight themselves.