Solar system consists from 9 planets. Solar System Memory is a game of pairs but with the planets rather than playing cards. Pick two of the same planet and the will disappear leaving a picture in the background. The picture is that of the Solar System. There is a timer on-screen so you know how long it takes you to do the puzzle.
Play with mouse. Click on the hidden pictures and discover solar system planets. Two same photo disappears. Your goal is to clear table as soon, as you can.