What this represents;
1) The shield on the left is the Spanish coat of arms.
1a) The Castle represents Castille.
1b) The Lion represents Leon.
1c) The Stripes represent Aragon.
1d) The Chains represents Navarre.
1e) The bottom Flower represents Granada.
1f) The middle Flowers represent the House of Bourbon.
2) The shield on the right is a proposed flag of Mars.
3) The Pillars represent the Pillars of Hercules.
4) The quote says "Plus Ultra", meaning "Further Beyond" in Latin.
5) The Crown represents the Spanish Royal Crown.
6) The shields aren't combined to represent how Spain and the SMT are located on different planets.