Here are two more stamps with my artwork in this set issued by Somalia in 2005. It features old artwork of what was then called the Mars 98 Surveyor Lander, later renamed Mars Polar Lander. I only created two of the images used in this stamp set.

This was my very first image of the Polar Lander. It seems highly improbable to me that it would ever have become a postage stamp.

This is one of my early images of the Mars Science Laboratory that I created in 2003.