Take a space flight in the game Planet Pairs, you will see many different planets, and for one you will train your visual memory. The planets are hidden behind identical greenish square tiles. By clicking on the tile, you make it turn and see the planet that is hiding behind it. Find the exact same one on the field and remove both identical pairs. This Planet Pairs game is relaxation, no one is rushing you anywhere, the time is unlimited, calmly turn the tiles, look for planets and delete them without hurrying or being nervous. The cosmos will be calm and unperturbed.