Dragon Returns to Earth with Valuable Research in Tow

The SpaceX Dragon cargo craft approaches the International Space Station.
Media Credit: NASA
June 30, 2023 • By Amy Thompson, Staff Writer
After 23 days docked to the International Space Station (ISSInternational Space Station), the Dragon spacecraft supporting SpaceX’s 28th Commercial Resupply Services mission(Abbreviation: CRS mission) A CRS mission is a cargo resupply mission contracted by NASA to deliver supplies and research to the International Space Station on commercial spacecraft as part of the CRS contract with three commercial companies. As part of CRS missions, experiments currently return to Earth on SpaceX Dragon spacecraft that splash down in the ocean. returned to Earth on June 30. The cargo capsule was packed with a host of research investigations, many of which were sponsored by the ISS National Laboratory to improve lives on Earth and enable a robust economy in low Earth orbit(Abbreviation: LEO) The orbit around the Earth that extends up to an altitude of 2,000 km (1,200 miles) from Earth’s surface. The International Space Station’s orbit is in LEO, at an altitude of approximately 250 miles..
Here’s a look back at some of the science payloads that recently returned to Earth.
Ring Shear Drop

The Ring Sheared Drop system on the ISS containing a concentrated solution of human serum albumin, the main protein constituent of blood. Small white dots are glass tracer particles that allow researchers to study fluid flow of biofluids in space.
Media Credit: Arizona State University/NASA
A project from a team of researchers at Arizona State University and Rensselaer Polytechnic Institute examined how fluids behave in microgravityThe condition of perceived weightlessness created when an object is in free fall, for example when an object is in orbital motion. Microgravity alters many observable phenomena within the physical and life sciences, allowing scientists to study things in ways not possible on Earth. The International Space Station provides access to a persistent microgravity environment.. The project, which was funded by the U.S. National Science Foundation, aims to understand fluid forces that can lead to protein aggregation (clustering) during drug development. The team observed how droplets form in microgravity when experiencing shear (two forces sliding past each other). In microgravity, many processes that affect the behavior of fluids on Earth—such as convection, sedimentation, and buoyancy—are absent, allowing researchers to study fluids in ways not possible on the ground. Protein aggregation can affect the quality of pharmaceuticals, and results from this project could help improve drug development.
Protein Crystals

United Arab Emirates astronaut Sultan Alneyadi works on an investigation aiming to crystallize biotherapeutics in microgravity to improve in-space and Earth production techniques that may shorten the development cycle for new drugs.
Media Credit: NASANational Aeronautics and Space Administration
An investigation from pharmaceutical company Bristol Myers Squibb (BMS) leveraged the ISS National Lab to improve the crystallization of biologic medicines, which are protein-based therapeutics derived from living cells. The sustained microgravity environment on the space station provides ideal conditions for growing high-quality protein crystals, which could allow BMS to improve the formulation and stability of therapeutics so they can be more easily injected under the skin.
Zero G Oven

A view of a food sample that was heated up inside the space station’s Zero G oven.
Media Credit: NASA
After nearly four years on the space station, the Zero G Kitchen Oven developed by Nanoracks returned to Earth. It was part of a technology demonstration mission to explore new methods of food production in space. The project, which launched in 2019, examined how to heat and then cool the space oven in a manner that is safe for crew members.
Improved Solar Devices

Copper inidium sulfide (CuInS2) crystals were annealed in microgravity to help reduce defects commonly found in terrestrially-grown crystals.
Media Credit: NASA
Researchers from Stanford University are aiming to improve how we power the globe by developing more energy-efficient photovoltaic devices. To do so, they annealed copper indium sulfide (CuInS2) semiconductor crystals in space to create more uniform crystals that have an even electrical conductivity. Results from this investigation could yield higher-quality crystals, which would enable the development of more efficient photovoltaic devices.
Genes in SpaceAn annual national research competition for students in grades 7 through 12 to design pioneering biotechnology experiments that are conducted by astronauts on the space station. The program is funded by Boeing and miniPCR bio and supported by the ISS National Laboratory® and New England BioLabs.™ 10

Onuoha’s experiment to measure teleomere lengthing in space used the station’s minipcr machine to amplify DNA.
Media Credit: NASA
The latest Genes in Space™ student investigation, proposed by Pristine Onuoha, a student from East Chapel Hill High School, tested a method to measure telomere lengthening in space. Telomeres are sections of DNA that protect chromosomes from damage. Results from research on telomere lengthening could aid in the development of future therapeutics to combat the aging process in people on Earth or those living in space.