Tracy Caldwell-Dyson

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ISS Expedition 70 Patch.svg
Mission insignia for International Space Station (ISS) Expedition 70

• The Expedition 70 patch is designed around the central yin-yang symbol representing balance; first and foremost, the balance of our beautiful planet Earth that is encircled by the yin-yang symbol and which forms part of the Expedition number. In our exploration of space, we are reminded of the uniqueness of Earth; the further we push the boundaries of human existence, the stronger our longing for our home planet grows. As our understanding of the cosmos expands, so does our understanding of Earth, and although we live in an ever-changing world, we recognize the need for a planet in balance to ensure our future.
• Space exploration is also about creating the future of our dreams. The tentative first steps we take today will hopefully become a well-trodden path in the future. This is represented stylistically by the “retro-futuristic” design of the patch, which mimics the design of the posters depicting the future from the early days of the space age. It is also emphasized by the yellow, orange, and red colors suggesting a sunrise. Lastly, the dynamism in the depiction of the number 7 suggests not only the physical launch into space, but also humanity’s progress towards the future.

ISS Expedition 23 Patch.svg
The focal point of the Expedition XXIII emblem illustrates the beautiful planet Earth in the black expanse of space. The International Space Station (ISS) is shown traveling in its orbit around Earth. The ISS orbital path flies through the XXIII to show that this increment is building upon the missions that have gone on before and laying the groundwork for future missions. This illustrates the work being performed aboard the orbiting complex that will lead the way to eventual missions to the moon, Mars and beyond. The mission designation uses Roman numerals to illustrate the home nations of the crew, which are also represented by their national flags. The two stars represent the two teams that make up this expedition crew.

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The STS-118 patch represents Space Shuttle Endeavour on its mission to help complete the assembly of the International Space Station (ISS), and symbolizes the pursuit of knowledge through space exploration. The flight will accomplish its ISS 13A.1 assembly tasks through a series of spacewalks, robotic operations, logistics transfers, and the exchange of one of the three long-duration expedition crew members. On the patch, the top of the gold astronaut symbol overlays the starboard S-5 truss segment, highlighting its installation during the mission. The flame of knowledge represents the importance of education, and honors teachers and students everywhere. The seven white stars and the red maple leaf signify the American and Canadian crew members, respectively, flying aboard Endeavour.

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Astronaut Tracy Caldwell, mission specialist of STS-118.

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Self portrait of Tracy Caldwell Dyson in the Cupola module of the International Space Station observing the Earth below during Expedition 24.

ISS Expedition 71 Patch.png
Mission insignia for International Space Station (ISS) Expedition 71

• For nearly a quarter of a century the International Space Station (ISS) has hosted crews and accommodated science experiments even as it has continued to evolve into the highly capable orbiting laboratory of today. With its unique vantage point, the ISS serves as an intersection for discoveries ranging from the vast, such as the search for dark matter and cosmological origins, to the near, such as detailed observation of our home planet and its atmosphere, to the microscopic, including behavior of microbial life, DNA sequencing, and molecular biology in the microgravity environment.
• The Expedition 71 patch celebrates this science as well as the thousands of multinational scientists and technicians that have contributed to numerous groundbreaking experiments. The ISS is the ultimate destination for the scientifically curious.
•  The symbology represents onboard research into quantum behavior of novel states of matter, antibodies and immune function, the search for dark matter, flame and combustion physics, DNA expression, plant growth and root behavior, and direct earth observation. The human eye and microscope objectives at upper left form the apex of a cone of vision culminating in the Expedition number 71, and represents the deliberate and disciplined practice of scientific observation.
• Earth’s moon and Mars are also depicted as next steps for exploration, with an anticipation of further rich scientific discovery using many techniques and skills honed aboard the ISS.

ISS Expedition 24 Patch.svg
The official crew patch for Expedition 24, the 24th long-duration mission to the International Space Station.

• Science and Exploration are the cornerstones of NASA's mission onboard the International Space Station (ISS). This emblem signifies the dawn of a new era in our program's history. With each new expedition, as we approach assembly complete, our focus shifts toward the research nature of this world-class facility. Prominently placed in the foreground, the ISS silhouette leads the horizon. Each ray of the sun represents the five international partner organizations that encompass this cooperative program. Expedition 24 is one of the first missions expanding to a crew of six. These crews, symbolized here as stars arranged in two groups of three, will launch on Soyuz vehicles. The unbroken flight track symbolizes our continuous human presence in space, representing all who have and will dedicate themselves as crew and citizens of the International Space Station.