An ACEO is a small collectible piece of art, the same size as a baseball card. It is 2 1/2 inches wide by 3 1/2 inches long. This is a geometric, abstract card. I hand-painted all of the papers used on the card. It is signed on the back and has my initials on the front. The card is entitled "Heliosphere."  The heliosphere is the outer limit of the sun's magnetic influence in the solar system. It consists of energetic "bubbles" which interact with each other and sometimes overlap. The heliosphere protects the solar system from the destructive energies of interstellar space.  The translucent shapes in the card remind me of those bubbles.