ISS018-S-001B (May 2008) --- This emblem represents the eighteenth expedition to the International Space Station (ISS). Featured prominently is the Roman numeral XVIII. The "X" evokes exploration, which is at the core of the indivisible cooperation of the International Space Station partners. "V" is for victory and for the five space agencies in the ISS program. "III" stands for the hope that this crew will help evolve the ISS from supporting the last three-person crew to crews of six explorers and researchers. The moon, sun and stars symbolize the efforts of the entire ISS team, which will lead to the human exploration of the moon, our solar system and beyond.
The NASA insignia design for space station flights is reserved for use by the astronauts and for other official use as the NASA Administrator may authorize. Public availability has been approved only in the form of illustrations by the various news media. When and if there is any change in this policy, which is not anticipated, it will be publicly announced.