Blue Marbles

This is a very simple, self-explanatory series of images and animations comparing the sizes of different planets in the Solar System by mass and volume. The first sequence, Blue Marbles, shows how many Earths are needed to equal the masses of the giant planets of the outer Solar System by dropping them like marbles. The second sequence, Rocky Marbles, does the same but using the Earth as the target and with the "marbles" being some of the smaller planetary bodies. A few more details and jokes are available on the accompanying blog posts.

Blue Marbles

Rocky Marbles